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  1. 1
    by Wolfensberger, R.
    Published 1964
    Wildegg, Technische Forschungs- und Beratungstelle der Schweizerischen Zementindustrie, 1964.
    119 p. illus. diagrs. 21 cm.
  2. 2
    by Hencky, Heinrich, 1885-
    Published 1913
    München : R. Oldenbourg, 1913.
    94 p. : ill. ; 26 cm.
  3. 3
    by Hugi, Hans
    Published 1958
    Zürich, Leemann [c1958]
    105 p. illus.

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