Edward Knobel

title	ISBN-13 (ISBN-10)	year of publication
Field Guide to the Grasses, Sedges, and Rushes of the United States	978-0-486-23505-9 (0-486-23505-X)	1977
Identify Trees and Shrubs by Their Leaves	978-0-486-22896-9 (0-486-22896-7)	1972