TY  - GEN
AU  - Poper, Karl R.
TI  - Conjectures and refutations : : the growth of scientific knowledge 
SN  - 0710065086
U1  - 193 POP 
PY  - 1972///
CY  - London : 
PB  - Routledge
KW  - Philosophy - Popper
N1  - Includes bibliographical references and index
ER  -