TY  - BOOK
AU  - Hennings,George
AU  - Hennings,Dorothy Grant
TI  - Keep Earth clean, blue & green: environmental activities for young people 
SN  - 0590074601
AV  - TD178 .H46 1976
U1  - 363.6 
PY  - 1976///
CY  - New York
PB  - Citation Press
KW  - Environmental education
KW  - Environmental protection
KW  - Study and teaching
N1  - Includes bibliographical references (p. 227-236)
N2  - A source book for elementary and junior high teachers which provides numerous interdisciplinary environmental activities
UR  - http://www.archive.org/details/keepearthcleanbl00henn
UR  - http://www.openlibrary.org/books/OL7884554M
ER  -