GEMS (Project) & Barrett, K. (1994). Investigating artifacts: Making masks, creating myths, exploring middens : teacher's guide : grades kindergarten-6. Great Explorations in Math and Science, Lawrence Hall of Science, University of California at Berkeley.
Cita Chicago (17th ed.)GEMS (Project) i Katharine Barrett. Investigating Artifacts: Making Masks, Creating Myths, Exploring Middens : Teacher's Guide : Grades Kindergarten-6. Berkeley, CA: Great Explorations in Math and Science, Lawrence Hall of Science, University of California at Berkeley, 1994.
Cita MLA (9th ed.)GEMS (Project) i Katharine Barrett. Investigating Artifacts: Making Masks, Creating Myths, Exploring Middens : Teacher's Guide : Grades Kindergarten-6. Great Explorations in Math and Science, Lawrence Hall of Science, University of California at Berkeley, 1994.