diff --git a/app/controllers/ingredients_controller.rb b/app/controllers/ingredients_controller.rb
index 0dde53d..efcd0b2 100644
--- a/app/controllers/ingredients_controller.rb
+++ b/app/controllers/ingredients_controller.rb
@@ -7,7 +7,7 @@ class IngredientsController < ApplicationController
 
   def index
     @ingredient = @project.ingredients.new
-    # passing attr for after_initialize
+    # passing attr for Nutrient after_initialize
     @ingredient.nutrients.new(ingredient: @ingredient)
     @ingredients = @project.ingredients.includes(:ref_unit)
     @ingredients << @ingredient
diff --git a/app/controllers/sources_controller.rb b/app/controllers/sources_controller.rb
index c53dd97..a1cf616 100644
--- a/app/controllers/sources_controller.rb
+++ b/app/controllers/sources_controller.rb
@@ -39,7 +39,7 @@ class SourcesController < ApplicationController
   # :find_* methods are called before :authorize,
   # @project is required for :authorize to succeed
   def find_source
-    @unit = Source.find(params[:id])
+    @source = Source.find(params[:id])
     @project = @source.project
   rescue ActiveRecord::RecordNotFound
     render_404
diff --git a/app/models/source.rb b/app/models/source.rb
index 12221de..01160d9 100644
--- a/app/models/source.rb
+++ b/app/models/source.rb
@@ -1,2 +1,5 @@
 class Source < ActiveRecord::Base
+  belongs_to :project, required: false
+
+  validates :name, presence: true, uniqueness: {scope: :project_id}
 end
diff --git a/app/views/sources/_form.html.erb b/app/views/sources/_form.html.erb
new file mode 100644
index 0000000..0da28d8
--- /dev/null
+++ b/app/views/sources/_form.html.erb
@@ -0,0 +1,6 @@
+<%= error_messages_for @source %>
+
+<div class="box tabular">
+  <p><%= f.text_field :name, required: true, size: 20 %></p>
+  <p><%= f.text_area :description, rows: 3, cols: 60 %></p>
+</div>
diff --git a/app/views/sources/index.html.erb b/app/views/sources/index.html.erb
index 255a1fb..c024a01 100644
--- a/app/views/sources/index.html.erb
+++ b/app/views/sources/index.html.erb
@@ -1 +1,48 @@
-<h2>SourcesController#index</h2>
+<% content_for :sidebar do %>
+  <%= render :partial => 'body_trackers/sidebar' %>
+<% end %>
+
+<div class="contextual">
+  <% if User.current.allowed_to?(:manage_common, @project) %>
+    <%= link_to t(".heading_new_source"), '#', :class => 'icon icon-add',
+      :onclick => 'showAndScrollTo("add-source", "source_name"); return false;' %>
+  <% end %>
+</div>
+
+<div id="add-source" <%= 'style=display:none;' if @source.errors.empty? %>>
+  <h2><%= t ".heading_new_source" %></h2>
+
+  <%= labelled_form_for @source,
+                        :url => project_sources_path(@project),
+                        :html => {:id => 'source-form'} do |f| %>
+    <%= render :partial => 'sources/form', :locals => { :f => f } %>
+    <%= submit_tag l(:button_create) %>
+    <%= link_to l(:button_cancel), "#", :onclick => '$("#add-source").hide()' %>
+  <% end %>
+  <hr>
+</div>
+
+<h2><%= t ".heading" %></h2>
+<% if @sources.many? %>
+  <table class="list">
+    <thead>
+      <tr>
+        <th><%= l(:field_name) %></th>
+        <th><%= l(:field_description) %></th>
+        <th style="width:15%"><%= l(:field_action) %></th>
+      </tr>
+    </thead>
+    <tbody>
+      <% @sources.each do |s| %>
+        <% next if s.new_record? %>
+        <tr id="source-<%= s.id %>" class="source">
+          <td class="name"><%= s.name %></td>
+          <td class="description"><%= s.description %></td>
+          <td><%= delete_link source_path(s), data: {} %></td>
+        </tr>
+      <% end %>
+    </tbody>
+  </table>
+<% else %>
+  <p class="nodata"><%= l(:label_no_data) %></p>
+<% end %>
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c167a66..c8f533d 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -54,6 +54,10 @@ en:
       groups:
         other: 'other'
         meat: 'meat'
+  sources:
+    index:
+      heading: 'Data sources'
+      heading_new_source: 'New source'
   quantities:
     index:
       heading: 'Quantities'
diff --git a/lib/body_tracking/project_patch.rb b/lib/body_tracking/project_patch.rb
index debed83..ef00929 100644
--- a/lib/body_tracking/project_patch.rb
+++ b/lib/body_tracking/project_patch.rb
@@ -3,6 +3,7 @@ module BodyTracking
     Project.class_eval do
       has_many :ingredients, -> { order "name" }, dependent: :destroy
 
+      has_many :sources, dependent: :destroy
       has_many :quantities, -> { order "lft" }, dependent: :destroy
       has_many :units, dependent: :destroy
     end