Morris, J. (1947). The escalator method in engineering vibration problems. Chapman & Hall.
Lua i Stíl Chicago (17ú heag.)Morris, Joseph. The Escalator Method in Engineering Vibration Problems. Lond.: Chapman & Hall, 1947.
Lua MLA (8ú heag.)Morris, Joseph. The Escalator Method in Engineering Vibration Problems. Chapman & Hall, 1947.
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