An Economic and Geographic Study of Some Transport Pollutants in the Towns along the Yantra River. (V. Doikov, S. Dermendjieva, A. Dermendjiev), Stable development and ecology – XXI Century. Sofia, 1991, p. 80.


Дерменджиева, Стела (1991) An Economic and Geographic Study of Some Transport Pollutants in the Towns along the Yantra River. (V. Doikov, S. Dermendjieva, A. Dermendjiev), Stable development and ecology – XXI Century. Sofia, 1991, p. 80. Stable development and ecology – XXI Century. Sofia, p. 80.


 
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