HEYWOOD (I) / CORNELIUS (S) CARVER (S), . (2000). An Introduction to Geographical Information Systems. New York: LONGMAN SCINTIFIC TECH. E.
HEYWOOD (I) / CORNELIUS (S) CARVER (S), . 2000. An Introduction to Geographical Information Systems. New York: LONGMAN SCINTIFIC TECH. E.
HEYWOOD (I) / CORNELIUS (S) CARVER (S), . An Introduction to Geographical Information Systems. New York: LONGMAN SCINTIFIC TECH. E. 2000.