共 7 条
- [1] KOHNER EM, 1978, T OPHTHAL SOC UK, V98, P299
- [2] LINDSTEDT E, 1969, ACTA OPHTHALMOL S, V104, P22
- [3] SORSBY S, 1966, REP HLTH SOC SUBJ LO, V14
- [4] 1981, ANN ESTIMATE POPULAT
- [5] 1980, VISION PROBLEMS US
- [6] 1966, BLINDNESS WHO EPIDEM, V19, P433
- [7] 1981, STATISTICAL STUDIES