TY - BOOK AU - Rao, K R ED - National Remote Sensing Agency, (Andhra Pradesh) TI - NRSA technical reports U1 - 333 21st PY - 1977/// CY - Secunderabad PB - NRSA KW - Remote sensing; Artificial satellites in surveying; Natural resources N1 - Contents: V.7. Satellite remote sending survey of upper barak river watershed ER -