00262nam a2200109 a 450000500170000002000150001708200130003210000170004524500340006226000280009630000280012420251203110759.0  a0415278449  a501bPOP  aPopper, Karl  aLogic of Scientific Discovery  aLondonbRoutledgec1999  axxvii, 513p.c24 cm. PB