Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Betrem, J. G. (Johan George), b. 1899 and Bradley, J. Chester (James Chester), b. 1884","The African Campsomerinae (Hymenoptera, Scoliidae)",,Nederlandse Entomologische Vereniging,1971,Monografieën van de Nederlandse Entomologische Vereniging,,,,https://cir.nii.ac.jp/crid/1130000797562825216