Não informado. (1946). Farm equipment retailing. National Retail Farm Equipment Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Farm Equipment Retailing. Washington: National Retail Farm Equipment Association, 1946.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Farm Equipment Retailing. National Retail Farm Equipment Association, 1946.
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