Christensen, J. M., & Vidal, R. V. (1987). PROJECT EVALUATION FOR ENERGY SUPPLY IN RURAL AREAS OF DEVELOPING COUNTRIES. RISO National Laboratory.
Citace podle Chicago (17th ed.)Christensen, John M., a Rene Valqui Vidal. PROJECT EVALUATION FOR ENERGY SUPPLY IN RURAL AREAS OF DEVELOPING COUNTRIES. Roskilde: RISO National Laboratory, 1987.
Citace podle MLA (9th ed.)Christensen, John M., a Rene Valqui Vidal. PROJECT EVALUATION FOR ENERGY SUPPLY IN RURAL AREAS OF DEVELOPING COUNTRIES. RISO National Laboratory, 1987.
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