TY  - GEN
AU  - ACKERMANN, Robert John
TI  - The philosophy of Karl Popper: Robert John Ackermann 
SN  - 0-87023-198-7
AV  - B 1649 .P644 A3 
PY  - 1976///
CY  - Amherst
PB  - University of Massachusetts press
KW  - Popper, Karl Raimund, Sir, 1902-
ER  -