TY  - BOOK
AU  - Henson,Kenneth T.
AU  - Janke,Delmar
TI  - Elementary science methods / 
SN  - 007028265X : 
PY  - 1984///
CY  - New York : 
PB  - McGraw-Hill, 
KW  - Science
KW  - Study and teaching (Elementary)
N1  -  Includes bibliographical references and indexes
ER  -