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- [2] ABC OF OPHTHALMOLOGY - EVALUATING COMMON SIGNS AND SYMPTOMS BRITISH MEDICAL JOURNAL, 1979, 1 (6160): : 389 - 393
- [3] Spina bifida occulta: (1) With external signs, with symptoms. (2) With external signs, without symptoms. (3) Without external signs, with symptoms. (4) Without external signs, without symptoms. AMERICAN JOURNAL OF THE MEDICAL SCIENCES, 1918, 155 : 473 - 502