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Subjects
Study and teaching (Middle school), Experiments, Problems, exercises, Activity programs, Astronomy, Astronomy, observers' manuals, Astronomy, study and teaching, Electromagnets, Observers' manuals, Study and teaching, ASTRONOMY_OBSERVERS' MANUALS, ASTRONOMY_STUDY AND TEACHING, Astronomy - General, Bridge, Electric batteries, Electricity, Gravity, Photographic interpretation, Remote sensing, Science, Science / Astronomy, Solar heating, Solar houses, Wind power, Wind turbinesID Numbers
- OLID: OL2876406A
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April 29, 2008 | Created by an anonymous user | initial import |