TY  - BOOK
AU  - Yardley,Alice
TI  - Discovering the physical world / 
SN  - 0237286459
U1  - 372.35 
PY  - 1970///
CY  - London : 
PB  - Evans, 
KW  - Science
KW  - Study and teaching (Elementary)
KW  - Mathematics
N1  -  Includes bibliographical references (p. 140-142) and index
ER  -