Extension Service bulletin.

Wedi'i Gadw mewn:
Manylion Llyfryddiaeth
OCLC:22974522
Awdur Corfforaethol: Iowa State College. Extension Service
Iaith:English
Cyhoeddwyd: Ames, Iowa : The Service, 1921-1934.
Pynciau:
Agricultural extension work > Iowa > Periodicals.
Agriculture > Iowa > Periodicals.
Eitemau Perthynol:Yn parhau: Agricultural extension bulletin (Ames, Iowa)
Parhawyd gan: Extension circular (Iowa State College. Extension Service)
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