00000nam##2200000za#4500 9.696927 CaOODSP 20250506145324 cr ||||||||||| 150407|1977||||xxc|||||o f|0| 0 eng|d CaOODSP eng n-cn--- A53-1569/1977E-PDF Canada. Agriculture Canada. Discers / [electronic resource] [by] O. H. Friesen. Ottawa - Ontario : Agriculture Canada c1977. 40p. figs., tables, photographs Publication 1569E. The catalogue number (A53-1569/1977E) and ISBN (0-662-00947-9) for the print edition have been copied in this electronic publication. Historical publication digitized by Agriculture and Agri-Food Canada. 12-42-Supp 2012-11-21 Agricultural technology gcpds Friesen, O. H. Les charrues à disques pour l'ouest canadien / (CaOODSP)9.641006 http://publications.gc.ca PDF 2.31 MB https://publications.gc.ca/collections/collection_2012/agr/A53-1569-1977-eng.pdf