共 19 条
[1]
BEECHAM D, 1967, ULTRASONICS, V5, P1
[5]
FOSTER NF, 1967, P I ELECTRICAL ELECT
[6]
FOSTER NF, TO BE PUBLISHED
[8]
GIBSON RW, 1966, ELECTRONICS LETTERS, V2, P6
[10]
HAERTLING GH, 1966, 3 WESC TECHN PAP 3