Roberts, J. A. (1952). Spring design and calculations (6th ed.). Technical Research Laboratory, Herbert Terry and Sons.
Chicago Style (17th ed.) CitationRoberts, John A. Spring Design and Calculations. 6th ed. Redditch, England: Technical Research Laboratory, Herbert Terry and Sons, 1952.
ציטוט MLARoberts, John A. Spring Design and Calculations. 6th ed. Technical Research Laboratory, Herbert Terry and Sons, 1952.
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