An Instance of Lightning Damage and Infestation of Ponderosa Pines by the Pine Engraver Beetle in Montana / Richard F. Schmitz and Alan R. Taylor.Richard F. Schmitz1969
Agriculture Problems in Arid and Semiarid Environmentsby ALAN A. BEETLEWoodbury · Plains Anthropologist1961PDF263 KB
Las Gramineas de Mexico, Tomo IIby Alan A. Beetle; D. Manrique Forceck; V. Jaramillo L.; M. P. Guerrero Sanchez; J. Alejandro Miranda Sanchez; Irama Nunez Tancredi; Aurora Chimal HernandezGilmartin · Society for Range Management1989PDF120 KB