4 ms·
http://open.umn.edu/opentextbooks/ http://open.umn.edu/opentextbooks/ is useful, I think.
by jimhefferon 8y ago
http://open.umn.edu/opentextbooks/ http://open.umn.edu/opentextbooks/ is useful, I think.
- jdeisenberg 8y agoThere’s also this from California: http://cool4ed.org/findetextbooks.html http://cool4ed.org/findetextbooks.html