共 8 条
- [1] COLQUHOUN D, 1971, LECTURES BIOSTATISTI, P21
- [2] Fleiss J. L., 1981, STATISTICAL METHODS, P1
- [5] DETERMINATION OF PERIODONTAL-DISEASE ACTIVITY [J]. JOURNAL OF PERIODONTOLOGY, 1981, 52 (09) : 492 - 499
- [8] SOCRANSKY SS, 1983, J CLIN PERIODONTOLOG, V10