California. State Department of Education. (1987). Science model curriculum guide, kindergarten through grade eight. California State Dept. of Education.
Citace podle Chicago (17th ed.)California. State Department of Education. Science Model Curriculum Guide, Kindergarten Through Grade Eight. Sacramento: California State Dept. of Education, 1987.
Citace podle MLA (9th ed.)California. State Department of Education. Science Model Curriculum Guide, Kindergarten Through Grade Eight. California State Dept. of Education, 1987.
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