TY  - BOOK
AU  - Nagel,Ernest
TI  - The Structure of Science: problems in the logic of scientific explanation 
U1  - 500 23
PY  - 1961///
CY  - New York
PB  - Harcourt, Brace & World ,Inc.
KW  - Science
N1  - Includes bibliographical references and index
ER  -