TY  - BOOK
AU  - United Nations
TI  - Global natural resource monitoring and assessments preparing for the 21st century proceedings of the international conference and workshop volume 3 September 24-30,1989 
SN  - 978-0-944426-26-5
U1  - 333.7 UNI 
PY  - 1990///
CY  - Bethesda 
PB  -  American Society for Photogrammetry and Remote Sensing
KW  - Natural Resource
ER  -