共 13 条
[3]
Gaag I. van der, 1994, Veterinary Annual, V34, P141
[4]
GOLDEN DL, 1993, SEMIN VET MED SURG, V8, P239
[6]
JERGENS AE, 1999, SMALL ANIMAL ENDOSCO, P323
[10]
WILCOCK B, 1992, SEMIN VET MED SURG, V7, P162

