1978
January January; 19 (1): 1 - 345	February February; 19 (2): 347 - 754	March March; 19 (3): 755 - 1112
April April; 20 (1): 1 - 324	May May; 20 (2): 325 - 586	June June; 20 (3): 587 - 875
July July; 21 (1): 1 - 348	August August; 21 (2): 349 - 685	September September; 21 (3): 687 - 1039
October October; 22 (1): 1 - 300	November November; 22 (2): 301 - 629	December December; 22 (3): 631 - 975