TY  - BOOK
AU  - Wyss,C.Von
TI  - The teaching of nature study,
U1  - 372.357 WYS 
PY  - 1930/// .
CY  - London
PB  - A. & C. Black Ltd. , 
KW  - Elementary education
KW  - Elementary school-nature study
KW  - Nature study
ER  -