Steiner systems
A list of Steiner systems, i.e. block designs with λ=1
The Fabulous (11, 5, 2) Biplane
A very readable account of the Paley biplane 2-(11,11,5,5,2) by Ezra Brown
Introduction to tournament plans
Explanation of list of tournament plans
List of tournament plans
Notation used for block designs
Some infinite sets of block designs
Further reading on block designs