[020-22] The Starling
The Starling Author: Hufford, G.N.
[020-21] A Preliminary Report on an Ecological Problem in the Illinois River Valley
A Preliminary Report on an Ecological Problem in the Illinois River Valley Author: Turner, Lewis M.
[020-19] The Fairy Shrimps of Illinois
The Fairy Shrimps of Illinois Author: Van Cleave, H.J.
[020-18] The Coati
The Coati Author: Givens, H.V.
[020-17] Marine Aquaria for High Schools and Colleges
Marine Aquaria for High Schools and Colleges Author: Thomas, Lyell J.