Tombs, M. (2011). US Patent No 7,930,114 Compensating for frequency change in flowmeters. United States Patent and Trademark Office.
Παραπομπή σε μορφή Chicago (17η εκδ.)Tombs, M. US Patent No 7,930,114 Compensating for Frequency Change in Flowmeters. United States Patent and Trademark Office, 2011.
Παραπομπή σε μορφή MLA (9th εκδ.)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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