Regulations framed under section one of ordinance no. 16 of 1904, for preventing the introduction and spread of insect pests and plant diseases in this colony Transvaal (Colony) Dept. of agriculture. creator text book Pretoria Govt. print. and stationery office 1907 1907
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ENG Agricultural pests Insect pests Plant diseases South Africa https://www.biodiversitylibrary.org/bibliography/56150 63604524 10.5962/bhl.title.56150 NIC