Invoice for Sonicor Ultrasonic Cleaning System CU-9616 HTFR-43, dated Mar. 30, 1988. |
Invoice for Sonicor Ultrasonic Cleaning Console CU-9310A, dated Dec. 3, 1986. |
Invoice for Sonicor Ultrasonic Cleaning System CU-9810A, dated Dec. 4, 1986. |
Invoice for Sonicor Ultrasonic Cleaning System UC-10314 HFTLL-43, dated Nov. 5, 1987. |
Invoice for Sonicor Ultrasonic Cleaning System CU-9610 HTFR, dated Aug. 14, 1987. |
Invoice for Sonicor Ultrasonic Cleaning System CU-4804 HTFR, dated Feb. 11, 1988. |
American Printer, p. 153, Jun. 1987. |
Packaging Printing & Converting, p. 74, Dec. 1988. |
Gravure Association of America. Mar. 28, 1988. |