00302pab a2200121 454500008004000000100001700040245003000057260000900087300001300096362000800109650002500117773003800142180718b1997   xxu||||| |||| 00| 0 eng d  aBunge, Mario  aMechanism and explanation  c1997  ap.410-65  aDec  aSociology of science  aPhilosophy of the Social Sciences