American Mathematical Monthly
Volume 61; Issue 14
|
|
7
|
|
9
|
|
10
|
|
11
|
|
12
|
|
13
|
|
16
|
|
17
|
|
24
|
|
27
|
|
28
|
|
29
|
|
32
|
|
33
|
|