Gillum, Donald R. Industrial pressure, level, and density measurement / Donald R. Gillum - 2nd ed. - Research Triangle Park, NC : International Society of Automation, 2009 - xxix, 624 p. : ill. ; 26 cm. ISBN: 9781934394342 (pbk.) Subjects--Topical Terms: Pressure transducersLevel indicatorsLiquids--Density--Measurement