1977
January January; 50 (589): 1 - 80	February February; 50 (590): 81 - 160	March March; 50 (591): 161 - 240
April April; 50 (592): 241 - 298	May May; 50 (593): 299 - 378	June June; 50 (594): 379 - 458
July July; 50 (595): 459 - 538	August August; 50 (596): 539 - 608	September September; 50 (597): 609 - 686
October October; 50 (598): 687 - 768	November November; 50 (599): 769 - 848	December December; 50 (600): 849 - 926