Part 1 1919- 1940
Lecture 1 1
Lecture 2 9
Lecture 3 25
Lecture 4 43
Lecture 5 60
Lecture 6 83
Lecture 7 101
Lecture 8 129
Lecture 9 148
Lecture 10 168
Lecture 11 184
Lecture 12 197
Lecture 13 217
Lecture 14 238
Lecture 15 260
Part 2 1940 to the present timeLecture 16 281
Lecture 17 290
Lecture 18 1302
Lecture 19 320
Lecture 20 338
Lecture 21 355
Lecture 22 372
Lecture 23 387
Lecture 24 408
Lecture 25 428
Lecture 26 448
Lecture 27 467
Lecture 28 494
Lecture 29 515
Lecture 30 534