1972
January Vol 49, Num 1: 1 - 163	February Vol 49, Num 2: 165 - 328	March Vol 49, Num 3: 329 - 488
April Vol 49, Num 4: 489 - 644	May Vol 49, Num 5: 645 - 798	June Vol 49, Num 6: 801 - 938
July Vol 50, Num 1: 1 - 179	August Vol 50, Num 2: 181 - 355	September Vol 50, Num 3: 357 - 510
October Vol 50, Num 4: 513 - 678	November Vol 50, Num 5: 681 - 836	December Vol 50, Num 6: 837 - 979