共 13 条
[1]
BECK AC, 1939, OBSTETRICAL PRACTICE, P555
[2]
BULLOWA JGM, 1937, MANAGEMENT PNEUMONIA, P439
[3]
CRAGIN EB, 1916, OBSTETRICS, P466
[4]
DELEE JB, 1943, PRINCIPLES PRACTICE, P493
[5]
EASTMAN NJ, 1950, WILLIAMS OBSTETRICS, P709
[6]
FINLAND M, 1939, J A M A, V12, P1027
[10]
Pratten FH, 1931, CAN MED ASSOC J, V24, P391