TY  - JOUR 
T1  - Geomorphology and land development in the Maraca area of northern Roraima, Brazil.
JO  - Acta Amazonica
A1  - McGregor, Duncan F. M.
A1  - Eden, Michael J.
SN  - 0044-5967
UL  - 10.1590/1809-43921991211407
VL  - 21 
Y1  - 1991
PB  - Brasil 
ER  -