1. Uncertainty evaluation and phase variation of ultrasonic interferometer manometer: A primary pressure and vacuum standard. (July 2019) Authors: Kumar, Ashok; Thakur, Vikas N.; Sharma, Rakesh; Kumar, Harish; Omprakash, ; Yadav, Sanjay Journal: Vacuum Issue: Volume 165(2019) Page Start: 232 Record Type: Journal Article View Content: Available online (eLD content is only available in our Reading Rooms) ↗