Over het vitamine A en de carotine bij bewaring van melk en room onder zuurstofdruk : zogenaamd Hofius - procede
Rede Wageningen, 25 Mei 1936
Despite the increase in substitutes for wood the world consumption of wood had increased. The principal timber-producing countries could not raise their production so that tropical forests would have to supply more of the world's timber. Tropical exploitation of timber however involved many difficulties and the supply may be more suitable for pulpi...