National Audubon Society Field Guide to the Pacific NorthwestNational Audubon SocietyEsaurito4,5Avvisami
The Concise Roget's International Thesaurus, Revised and Updated, 6th EditionBarbara Ann KipferEsaurito4,7Avvisami
National Geographic Complete National Parks of the United States, 3rd EditionNational GeographicEsaurito4,5Avvisami
