路德维希·雅可布·贝尔特勒 (Chinese Wikipedia)

Analysis of information sources in references of the Wikipedia article "路德维希·雅可布·贝尔特勒" in Chinese language version.

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worldcat.org

Bertele, Erhard. Ludwig J. Bertele. A Pioneer of Geometric Optics. vdf Hochschulverlag AG an der ETH Zürich 1. Zürich. 27 March 2019. ISBN 9783728139559. OCLC 1086563236. , p.92