American Mathematical Monthly
Volume 85; Issue 31
|
|
5
|
|
6
|
|
8
|
|
9
|
|
10
|
|
11
|
|
14
|
|
15
|
|
17
|
|
20
|
|
24
|
|
27
|
|
28
|
|
29
|
|
30
|
|
36
|
|
37
|
|
38
|
|
47
|
|