1
by Hardy, G. H.
Published 1921
2
by Larson
Published 2010
3
by Shifrin
Published 2005
4
by Adams
Published 2010
5
by Spivak
Published 2008
6
7
by Spiegel
Published 2010
8
by Thomas
Published 2010
9
by Banner
Published 2007
10
by Ross
Published 2000
11
by Goldstein
Published 2010
12
by Barnett
Published 2011
13
by Thomas
Published 2010
14
by Bittinger
Published 2012
15
by Thomas
Published 1992
16
by Adams
Published 1999
17
by Thomas
Published 2001
18
by Waner
Published 2001
19
by Hecht
Published 2000
20
by REX
Published 1999