เอานี้ก็แล้วกันครับ
The elements of plane trigonometry
http://www.archive.org/details/eleme...anet00leveuoft
A course of pure mathematics
http://www.archive.org/details/coursepuremath00hardrich
Descriptive geometry; a treatise from a mathematical standpoint, together with a collection of exercises and practical applications (1909)
http://www.archive.org/details/descr...eome00wilsrich
The Elements of Real Analysis R Bartle djvu
http://rapidshare.com/files/10610963...rtle.djvu.html
Real and complex analysis third edition Rudin djvu
http://rapidshare.com/files/10610943...udin.djvu.html