Textbook / 
SIegfried Engelmann, Susan Hanner 
 - Chicago, Henley-on-Thames, Sydney, Toronto  Science Research Associates, Inc  1983 
 - 461p  cm 
<br/><br/><label>ISBN: </label>0574101926 
<br/><br/><label>Dewey Class. No.: </label>421.54 ENG