TY  - BOOK
AU  - Hempel,Carl G.
TI  - Fundamentals of concept formation in empirical science.
T2  - International encyclopedia of unified science. Foundations of the unity of science,
U1  - 501 
PY  - 1952/// [impression 1962]
CY  - Chicago
PB  - University of Chicago Press
KW  - Science
KW  - Philosophy
N1  - Bibliography: p. 88-93
ER  -