Editore: The Colorado Museum of Natural History, Denver, 1939
Da: Clausen Books, RMABA, Colorado Springs, CO, U.S.A.
Prima edizione
Cloth. Condizione: Very Good. B&W Photographs (illustratore). First Edition. Previous owner's inked name/date along top edge of fep, couple small light blue smudges on ffep, otherwise clean and tight textblock. Some faint scractches and light shelf worn, plain brown cloth binding. 196p., including key and index. Wynar/Depp 8727. Size: 8vo - over 7¾" - 9¾" tall. Hardcover.
Editore: The Colorado Museum of Natural History, Denver, CO, 1947
Da: Clausen Books, RMABA, Colorado Springs, CO, U.S.A.
Prima edizione
Illustrated Wraps. Condizione: Very Good. Photographs; Front Cover Mural By Mary Chilton Gray (illustratore). Seventh Revised Edition. Ink signatue at top of front cover; The aged textblock is clean and tight; Lightly edge and corner worn, illustrated covers; 80p.; Wynar/Depp 8195. Size: 12mo - over 6¾" - 7¾" tall. Paperback.