Flawn, P. T. (1970). Environmental geology: Conservation, land-use planning, and resource management. New York: Harper & Row.
Παραπομπή Chicago StyleFlawn, Peter T. Environmental Geology: Conservation, Land-use Planning, and Resource Management. New York: Harper & Row, 1970.
Παραπομπή MLAFlawn, Peter T. Environmental Geology: Conservation, Land-use Planning, and Resource Management. New York: Harper & Row, 1970.
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