共 6 条
[2]
DIEM K, 1970, DOCUMENTA GEIGY SCI, P97
[3]
DRONFIELD MW, 1977, LANCET, V1, P1167
[4]
UPPER GASTROINTESTINAL ENDOSCOPY - GP SERVICE
[J].
BRITISH MEDICAL JOURNAL,
1977, 2 (6096)
:1199-1201