Gnadig, P. (2003). 200 Puzzling physics problems. Univ. Pr.
Tohutoru Kātū Chicago (17th ed.)Gnadig, Peter. 200 Puzzling Physics Problems. Cambridge: Univ. Pr, 2003.
Tohutoro MLA (9th ed.)Gnadig, Peter. 200 Puzzling Physics Problems. Univ. Pr, 2003.
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