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  1. By: Bos, J. Ritzema (Jan Ritzema ), - Bos, J. Ritzema (Jan Ritzema ), - Landbouwhogeschool Wageningen. - Rijks Hoogere Land-, Tuin, en Boschbouwschool.
    Publication info: Wageningen, H. Veenman, 1908-1918
    Holding Institution: Multiple institutions