TY  - BOOK
AU  -  Russell,Norwood Hanson
TI  -  Patterns of discovery : :  an inquiry into the conceptural foundatio ns of science
SN  -  52109242
U1  -  508 HAN 
PY  - 1958///, rep.1977
CY  -  London : 
PB  -  Cambridge University Press, 
KW  -  Natural History
ER  -