خلأ (Persian Wikipedia)

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

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archive.org

Harris, Nigel S. (1989). Modern Vacuum Practice. McGraw-Hill. p. 3. ISBN 0-07-707099-2.

worldcat.org

Chambers, Austin (2004). Modern Vacuum Physics. Boca Raton: CRC Press. ISBN 0-8493-2438-6. OCLC 55000526.