TY  - BOOK
AU  - Gensemer, Robert E.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
TI  - : perspectives, inquiry, applications 
SN  - 0-697-10691-8
SN  - 2
PY  - 1990///];copyright 1990.46
CY  - Dubuque, IA
PB  - Wm. C. Brown Publishers
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
N1  - Includes bibliographical references and index; 5
ER  -