Marquis Who's Who, I., & Debus, A. G. (1968). World who's who in science: A biographical dictionary of notable scientists from antiquity to the present. Chicago: Marquis-Who's Who, inc.MLA Citation
Marquis Who's Who, Inc., and Allen G Debus. World Who's Who in Science: A Biographical Dictionary of Notable Scientists From Antiquity to the Present. Chicago: Marquis-Who's Who, inc, 1968.