00409nam a2200121Ia 4500008004100000020001800041040001500059082002500074100004300099245007400142260005900216300001200275231128s9999    xx            000 0 und d  a0-201-02435-7  aPHSAcPHSA  aCIR  507.12 F22 1980  aFarmer, Walter A. Farrell, Margaret A. 0aSystematic instruction in science for the middle and high school year  aMassachusettsbAddison-Wesley Publishing Companyc1980  a353  p.