Tombs, M. (2011). US Patent No 7,930,114 Compensating for frequency change in flowmeters. United States Patent and Trademark Office.
Chicago-čujuhus (17. p.)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
MLA-čujuhus (9. p.)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
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