HHemizonia congestaHemizonia congestade E. B. Babcock, Harvey Monroe HallMateriasWeedsEdiciones (1)Hemizonia congesta (1924)University of California Press · inglésMás obras de E. B. BabcockSuggestions for garden work in California schoolsElementary school agriculture : a teacher's manual to accompany Hilgard and Osterhout's "Agriculture for schools of the pacific slope"Information for students concerning the College of Agriculture of the University of California
Elementary school agriculture : a teacher's manual to accompany Hilgard and Osterhout's "Agriculture for schools of the pacific slope"
