[12-19] Keys for the Separation of the Bremidae, or Bumblebees, of Illinois, and Other Notes
Keys for the Separation of the Bremidae, or Bumblebees, of Illinois, and Other Notes Author: Frison, Theodore H.
[027-005] Utilization of Illinois Lands for Forestry, Wild Life and Recreation
Utilization of Illinois Lands for Forestry, Wild Life and Recreation Author: Frison, T.H.
[031-003] Advances in the Renewable Natural Resources Program of Illinois
Advances in the Renewable Natural Resources Program of Illinois Author: Frison, Theodore H.
[035-01]Presidential Address: Conservation Research program of the Illinois Natural History Survey
Frison, Theodore H. Presidential Address: Conservation Research program of the Illinois Natural History Survey 035-01-print