پیرابین (Persian Wikipedia)

Analysis of information sources in references of the Wikipedia article "پیرابین" in Persian language version.

refsWebsite

Global rank Persian rank

2books.google.com

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books.google.com

Walker, Bruce H. (2000). Optical Design for Visual Systems. SPIE Press. p. 117. ISBN 978-0-8194-3886-7.
The Submarine Periscope: An Explanation of the Principles Involved in Its Construction, Together with a Description of the Main Features of the Barr and Stroud Periscopes. Barr and Stroud Limited. 1928.