Horton, R. E. (1928). Measurable outcomes of individual laboratory work in high school chemistry. Teachers college, Columbia university.
Lua i Stíl Chicago (17ú heag.)Horton, Ralph Ellison. Measurable Outcomes of Individual Laboratory Work in High School Chemistry. New York city: Teachers college, Columbia university, 1928.
Lua MLA (8ú heag.)Horton, Ralph Ellison. Measurable Outcomes of Individual Laboratory Work in High School Chemistry. Teachers college, Columbia university, 1928.
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