TY  - BOOK
AU  - Rockcastle,Verne N.
AU  - Salamon,Frank R.
AU  - Schmidt,Victor E.
ED  - Addison-Wesley Publishing Company.
TI  - Elementary school science: [level 3] 
SN  - 0201052830
AV  - Q161.2 gr3 .A3 E43
PY  - 1975///
CY  - Menlo Park
PB  - Addison-Wesley
KW  - Science
KW  - Study and teaching (Elementary)
UR  - http://www.archive.org/details/elementaryschool00rock
UR  - http://www.openlibrary.org/books/OL24206016M
ER  -