Obong, M. I. (1977). Developing thinking skills and attitude among grade four pupils using a module on the concept environment.
Lua i Stíl Chicago (17ú heag.)Obong, Mercedes Isidro. Developing Thinking Skills and Attitude Among Grade Four Pupils Using a Module on the Concept Environment. 1977.
Lua MLA (9ú heag.)Obong, Mercedes Isidro. Developing Thinking Skills and Attitude Among Grade Four Pupils Using a Module on the Concept Environment. 1977.
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