1973
January January; 13 (1): 1 - 79	February February; 13 (2): 83 - 2062	March March; 13 (3): 209 - 298
April April; 13 (4): 301 - 406	May May; 13 (5): 409 - 500	June June; 13 (6): 503 - 599
July July; 13 (7): 601 - 729	August August; 13 (8): 733 - 854	September September; 13 (9): 857 - 1003
October October; 13 (10): 1005 - 1123	November November; 13 (11): 1125 - 1262	December December; 13 (12): 1265 - 1342