U.S. Army. Food Procurement (Chapter 8). U.S. Army Survival Manual FM 21-76(PDF). U.S. Army. June 1992: 8–19, 8–20 [2011-12-01]. (原始内容存档(PDF)于2017-02-08).
U.S. Army. Food Procurement (Chapter 8). U.S. Army Survival Manual FM 21-76(PDF). U.S. Army. June 1992: 8–19, 8–20 [2011-12-01]. (原始内容存档(PDF)于2017-02-08).