American Mathematical Monthly
Volume 73; Issue 25
|
|
6
|
|
9
|
|
11
|
|
14
|
|
15
|
|
20
|
|
21
|
|
24
|
|
25
|
|
26
|
|
27
|
|
32
|
|
34
|
|
39
|
|
40
|
|
45
|
|
50
|
|
53
|
|
58
|
|
62
|
|
68
|
|