Young Readers Nature Library

Young Readers Nature Library is a 9-book series with 9 released primary works first released in 1963 with contributions by Leonard Engel, F. Clark Howell, Sarel Eimerl, Irven Devore, Arthur Beiser, Roger Tory Peterson, A. Starker Leopold, F.D. Ommanney, Richard Carrington, Nikolaas Tinbergen, and Ruth Moore.