Deere & Company. (1947). The Operation, care, and repair of farm machinery (21st ed.). John Deere.
Lua i Stíl Chicago (17ú heag.)Deere & Company. The Operation, Care, and Repair of Farm Machinery. 21st ed. Moline, Ill.: John Deere, 1947.
Lua MLA (8ú heag.)Deere & Company. The Operation, Care, and Repair of Farm Machinery. 21st ed. John Deere, 1947.
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