(1987). 1986-87 Directory of professional workers in state agricultural experiment stations and other cooperating state institutions. Washington: U.S Goverment Printing Office.
Dyfyniad Arddull Chicago1986-87 Directory of Professional Workers in State Agricultural Experiment Stations and Other Cooperating State Institutions. Washington: U.S Goverment Printing Office, 1987.
Dyfyniad MLA1986-87 Directory of Professional Workers in State Agricultural Experiment Stations and Other Cooperating State Institutions. Washington: U.S Goverment Printing Office, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.