TY  - BOOK
AU  - Abruscato, Joseph.
AU  - 
ED  - 
ED  - 
ED  - 
ED  - 
SN  - 138917639
SN  - 2
PY  - 1988///];copyright 1988.46
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - 
KW  - 2
KW  - 0
KW  - 6
KW  - 20
KW  - Study and teaching (Elementary)
KW  - Science
N1  - Includes index; Bibliography: p. 368; 5
ER  -