POPULAR SCIENCE LIBRARY. v. 4. The story of force and motion; physics, by D. W. Hering.
POPULAR SCIENCE LIBRARY. © P. F. Collier & Son Corp. (PWH) v. 4. The story of force and motion; physics, by D. W. Hering. © on new text & illus.; 30Dec30; A33272. 24Feb58; R209461.
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