Dept. of Hisory and Sociology of Science, University of Pennsylvania 1985-

2nd ser., v. 1 (1985) : hard , 2nd ser., v. 2 (1986) : pbk , 2nd ser., v. 2 (1986) : hard , 2nd ser., v. 3 (1987) : pbk , 2nd ser., v. 3 (1987) : hard , 2nd ser., v. 6 (1990)

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