TY - CONF T1 - Ultrasonic measurement of rolling element bearing lubrication using piezoelectric thin film transducers JO - REVIEW OF PROGRESS IN QUANTITATIVE NONDESTRUCTIVE EVALUATION, VOL 27A AND 27B PY - 2008/01/01 AU - Drinkwater BW AU - Zhang J AU - Kirk K AU - Elgoyhen J AU - Dwyer-Joyce RS ED - Thompson DO ED - Chimenti DE VL - 975 SP - 888 EP - 895 Y2 - 2025/08/11 ER -