A Guide to Parliamentary Papers: What They Are, How to Find Them, How to Use Them by P. Ford / LL 4th Floor & Reference: Z2009 A1 F6. This guide is very useful for information before 1960.
An Introduction to British Government Publications by J.G. Olle / Langson Reference Z2009 A1 O46
The Journal of the House of Commons: A Bibliographical and Historical Guide by David Menhennet / Langson Reference JN673 .M45