HOPKINS, J. A. Farm Records And Accounting John A. Hopkins And Earl O. Heady. Iowa State University Press.
Lua i Stíl Chicago (17ú heag.)HOPKINS, John A. Farm Records And Accounting John A. Hopkins And Earl O. Heady. Iowa State University Press.
Lua MLA (8ú heag.)HOPKINS, John A. Farm Records And Accounting John A. Hopkins And Earl O. Heady. Iowa State University Press.
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