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Archive of 1977 Online Issues:

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January
January; 68 (1): 3 - 67

March
March; 68 (2): 71 - 136

May
May; 68 (3): 139 - 204

July
July; 68 (4): 207 - 272

September
September; 68 (5): 274 - 344

November
November; 68 (6): 347 - 418