TY  - BOOK
AU  - Opie,Frank w.j.
TI  - The green years: an environmental research manual for senior, primary and junior secondary  teacheers.
SN  - 0636024709
U1  - 372.357 
PY  - 1997///
CY  - Cape Town
PB  - Maskew Miller Longman
KW  - Environment
KW  - South Africa
N1  - includes bibliographical references
ER  -