American Mathematical Monthly
Volume 72; Issue 65
|
|
12
|
|
21
|
|
22
|
|
27
|
|
28
|
|
30
|
|
33
|
|
36
|
|
37
|
|
39
|
|
42
|
|
44
|
|
47
|
|
49
|
|
51
|
|
52
|
|
55
|
|
56
|
|
57
|
|
62
|
|
64
|
|
66
|
|
69
|
|