Residue coefficients for Indiana hardwood sawlogs / John C. Callahan and Roger M. Nacker.John Conrad Callahan1970
School finance reformJohn J Callahan, William H Wilken, National Conference of State Legislatures Legislators' Education Action Project1976
Allocating Indiana hardwood timber in multiple product situations / Robert B. Forster and John C. Callahan.Robert B. Forster1968
The timber marketing process in Indiana / John C. Callahan, John M. Toth, Joseph T. O'Leary.John Conrad Callahan1979EN
Standing timber coefficients for Indiana walnut log production James E. Blyth, Edwin Kallio, John C. Callahan.James E. Blyth1969EN