Iain Dale 
Volume Three. Liberal Party General Election Manifestos 1900-1997 [PDF ebook] 

This volume brings together for the first time the British Liberal Political Party General Election Manifestos, dating back to 1900, and including the most recent General Election manifesto of 1997.
The project provides an indispensible source of data about the Liberal Party”s political ideologies and policy positions, as well as charting their changes over time.
The volume has a new introduction written by Duncan Brack, who is Programmes Director at the Royal Institute of International Affairs. He was previously the Policy Director for the Liberal Democrats and editor of the Dictionary of Liberal Biography, published by Politicos in February 1999.
In addition to the new introduction, the volume has a comprehensive index, making it easy to use.