. . _:Ba433d685ce57bcf60b5966b5aa51d4ca . "Plessis, David J. du" . "Plessis, David du" . . . "1905"^^ . "David Johannes Du Plessis" . "Du Plessis, David Johannes (1905-)" . "David Johannes" . "Du Plessis" . _:Ba433d685ce57bcf60b5966b5aa51d4ca . _:Ba433d685ce57bcf60b5966b5aa51d4ca . _:Ba433d685ce57bcf60b5966b5aa51d4ca "2023-05-21"^^ . _:Ba433d685ce57bcf60b5966b5aa51d4ca . _:Ba433d685ce57bcf60b5966b5aa51d4ca . _:Ba433d685ce57bcf60b5966b5aa51d4ca "069070598" . _:Ba433d685ce57bcf60b5966b5aa51d4ca . _:Ba433d685ce57bcf60b5966b5aa51d4ca . _:Ba433d685ce57bcf60b5966b5aa51d4ca .