TY  - BOOK
AU  - Berkmüller,Klaus
AU  - Savasdisara,Tongchai
TI  - Guidelines and techniques for environmental interpretation
U1  - 790.068 23
PY  - 1981///
CY  - [Ann Arbor, Mich.
PB  - K. Berkmüller]
KW  - Natural history
KW  - Study and teaching
KW  - Nature study
ER  -