TY  - BOOK
AU  - Heal, O.w. /Menaut, J -C . /Steffen, W.L.
TI  - Towards a global terrestrial observing system [STOS] : Detecting and monitoring change in rerrestrial ecosystems 
SN  - 02801548
AV  - G 3170 .H4 
PY  - 1993///
CY  - Paris
PB  - UNESCO
KW  - Terrestrial globes , globes
ER  -