Pragmatism and Purpose

Essays Presented to Thomas A. Goudge

edited by Leonard Sumner, John G. Slater & Fred Wilson

Genera of Hyphomycetes

by (author) J.W. Carmichael, W. Bryce Kendrick & I.L. Conners

A Question of Physics

Conversations in Physics and Biology

by (author) Paul Buckley & F. David Peat

The Bird's Nest Fungi

by (author) Harold Brodie

The Odonata of Canada and Alaska

Volume Three, Part III: The Anisoptera-Three Families

by (author) Edmund Walker & Philip Corbet

Pacific Northwest Ferns and Their Allies

by (author) Thomas M.C. Taylor