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- Title:
- Science unit: heat and machines, grade five
- Corporate Author:
- Racine County (Wisconsin) Unified School District #1
- Date:
- 1961
- State/Country:
- Wisconsin
- Subjects:
- Machinery
- Title:
- Science unit: simple machines, grade three
- Corporate Author:
- Racine County (Wisconsin) Unified School District #1
- Date:
- 1961
- State/Country:
- Wisconsin
- Subjects:
- Machinery
- Title:
- Science unit: toys and tools, grade one
- Corporate Author:
- Racine County (Wisconsin) Unified School District #1
- Date:
- 1961
- State/Country:
- Wisconsin
- Subjects:
- Machinery, Toys
- Title:
- A study of machines and how they help us, grade 2
- Corporate Author:
- Chula Vista (California) City School District
- Date:
- 1960
- State/Country:
- California
- Subjects:
- Machinery
- Title:
- Guiding science experiences, gr. 1-3
- Corporate Author:
- Orange County (California) Superintendent of Schools
- Date:
- 1960
- State/Country:
- California
- Subjects:
- Science, Space sciences, Machinery
- Title:
- Workers and machines they use: resource unit for second grade
- Corporate Author:
- Fresno County (California) Schools
- Date:
- 1954
- State/Country:
- California
- Subjects:
- Machinery