Παραπομπή APA

Tomlinson, R. F. (1972). Environment information systems. Ottawa: International Geographical Union. Commission on Geographical Data Sensing and Processing.

Παραπομπή Chicago Style

Tomlinson, R. F. Environment Information Systems. Ottawa: International Geographical Union. Commission on Geographical Data Sensing and Processing, 1972.

Παραπομπή MLA

Tomlinson, R. F. Environment Information Systems. Ottawa: International Geographical Union. Commission on Geographical Data Sensing and Processing, 1972.

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