American Mathematical Monthly
Volume 80; Issue 11
|
|
3
|
|
7
|
|
9
|
|
10
|
|
11
|
|
18
|
|
19
|
|
20
|
|
25
|
|
34
|
|
35
|
|
36
|
|
38
|
|
40
|
|
43
|
|
45
|
|
57
|
|
64
|
|
65
|
|