انتشارات Usda
Claves para la taxonomía de suelos
USDA, 2014
Cooking: A World of New Tastes Volumes 1 through 5
Julie James, 2009
Dietary Guidelines for Americans
Kathleen Sebelius, 2010
Field Guide to Forest Plants of Northern Idaho
Patricia A., 1985
Field Guide to Native Oak Species of Eastern North America
John Stein, Denise Binion, Robert Acciavatti, 2003
National Individual Tree Species Atlas
James R. Ellenwood, Frank J. Krist Jr., Sheryl A. Romero, 2015
Manual de conservación de recursos naturales
José A. Castro López,, 2000
