National Asessment of Educational Progress (Project). (1978). The third assessment of science, 1976-77: Released exercise set. NAEP.
Citace podle Chicago (17th ed.)National Asessment of Educational Progress (Project). The Third Assessment of Science, 1976-77: Released Exercise Set. Denver: NAEP, 1978.
Citace podle MLA (9th ed.)National Asessment of Educational Progress (Project). The Third Assessment of Science, 1976-77: Released Exercise Set. NAEP, 1978.
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