00446    a2200157   4500020001500000082001300015100002400028245003600052250001200088260005400100300002000154440003000174650002600204650003700230700002100267  a0675076781  a570bHEI  aHeimler, Charles H.  aPrinciples of sciencebbook two  a4th ed.  aLondonbCharles E. Merrill Publishingc1966g1979  axii,532p.c24cm  aA merrill science program  aLife sciences biology  aNatural sciences and mathematics  aNeal, Charles D.