共 8 条
- [1] BAER GM, 1970, AM J EPIDEMIOLOGY, V93, P487
- [2] BLACK JG, 1970, CAN J COMPARAT MED, V34, P309
- [3] DEBBIE JG, IN PRESS
- [4] JOHNSON NH, 1964, DIAGNOSTIC PROCEDURE, P356
- [6] PARKER RL, 1966, AM J VET RES, V27, P33
- [7] SIKES RK, 1962, AM J VET RES, V23, P1041
- [8] 1966, WHO23 TECH SER