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Archive of 1970 Online Issues:

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January
January; 61 (1): 3 - 44

March
March; 61 (2): 47 - 88

May
May; 61 (3): 91 - 132

July
July; 61 (4): 135 - 176

September
September; 61 (5): 179 - 228

November
November; 61 (6): 231 - 296