Requested reference
Bücherl, W. (1971). Spiders. In: Venomous Animals and their Venoms. Academic Press, New York 3, 197-277. 
-- Show included taxa
Bücherl, W. (1971). Spiders. In: Venomous Animals and their Venoms. Academic Press, New York 3, 197-277. -- Show included taxa