共 7 条
[1]
Braly K, 1938, AM ANN DEAF, V83, P192
[2]
DUKEELDER WS, 1940, TEXTBOOK OPHTHALM ED, V2, P1199
[3]
GESELL A, 1949, VISION DEVELOPMENT I, P182
[4]
SLOANE AE, 1960, ARCH OPHTHALMOL-CHIC, V64, P763
[5]
SNELLEN H, CITED INDIRECTLY
[6]
STOCKWELL E, 1952, AMA ARCH OPHTHALMOL, V48, P428
[7]
1961, OPHTHALMIC INSTRUMEN