THE WORLD OF ALL OUTDOORS
Bailey, L. H.: The Outlook to Nature
Brearley, H. C.: Animal Secrets Told
Comstock, Anna B.: Handbook of Nature Study
Dixon, Royal: The Human Side of Plants
Grinnell, M.: Neighbors of Field, Wood and Stream
Knight, C. R.: Animals of the World for Young People; Birds of the World for Young People
Lounsberry, A.: The Wild Flower Book for Young People; The Garden Book for Young People; Frank and Bessie's Forester