written by the staff of the Ortho book series in association with the authors and consultants listed ... ; edited by Lance Walheim ; photography by William Aplin, Clyde Childress, Michael Landis ; ill. by Ron Hildebrand
Second edition, edited by Winifred Gregory. Advisory Committee appointed by the American Library Association: Donald B. Gilchrist, chairman 1937-1939; Wyllis E. Wright, chairman, 1939-1943 [and others].