Hammer, Paul Edward Johnston2006-11-252006-11-252004Oxford Dictionary of National Biography in association with the British Academy : from the earliest times to the year 2000 / H.C.G. Matthew and Brian Harrison (eds.), vol.32, pp. 609-610019861411X01986138221747-1001http://hdl.handle.net/2440/15719en© Oxford University Press 2004–7Book chapter002004243010.1093/ref:odnb/16086