A Simplified approach to predict surface runoff and water loss hydrographs14, [13] p. : ill. ; 28 cm.; "For presentation at the American Water Resources Association National Symposium on Watershed in Transition ... held at Colorado State University, Fort Collins, Colorado, June 19-22, 1972."; Cover title.
Pesticide containers in farmlandEverglades National Park; National Park ServiceOn slide: Pesticide containers Hole in donut; Litter dump; 2-22-72; Q-1; 002
Day two of pine fire in the distanceEverglades National Park; National Park ServiceWildfire "phantom" #5-72; 2nd day pines burning S.W. of Block A 2-22-72