Allen, C. E. (1969). Machinery's screw thread book (20th ed.). Machinery Publishing.
Chicago-viite (17. p.)Allen, Clarence Edgar. Machinery's Screw Thread Book. 20th ed. London: Machinery Publishing, 1969.
MLA-viite (8. p.)Allen, Clarence Edgar. Machinery's Screw Thread Book. 20th ed. Machinery Publishing, 1969.
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