Schoenfeld, C. (1972). Interpreting environmental issues: Research and development in conservation communications. Madison, WI: Dembar Educational Research Services.
Παραπομπή Chicago StyleSchoenfeld, Clay. Interpreting Environmental Issues: Research and Development in Conservation Communications. Madison, WI: Dembar Educational Research Services, 1972.
Παραπομπή MLASchoenfeld, Clay. Interpreting Environmental Issues: Research and Development in Conservation Communications. Madison, WI: Dembar Educational Research Services, 1972.
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