Authors most likely refering to this article, even though the page count is a little bit different: "The action of notexin from tiger snake venom (Notechis scutatus scutatus) on acetylcholine release and compartmentation in synaptosomes from electric organ of Torpedo marmorata (Pages 1039-1052
P. Mollier, G. Brochier, Y. Morot Gaudry-Talarmain)." We  don't have the paper, but we suggest, that this value is not for crude venom, but for notexin.