1991
January January; 35 (1): 1 - 213	February February; 35 (2): 215 - i3	March March; 35 (3): 399 - 603
April April; 35 (4): 605 - 790	May May; 35 (5): 791 - 1017	June June; 35 (6): 1019 - 1266
July July; 35 (7): 1267 - 1526	August August; 35 (8): 1527 - 1695	September September; 35 (9): 1697 - 1945
October October; 35 (10): 1947 - 2165	November November; 35 (11): 2167 - 2456	December December; 35 (12): 2457 - 2661