Perrys Handbook

http://www.4shared.com/document/a5cJAIlM/Perrys_Chemical_Engineers_Hand.html
http://avaxsearch.com/?q=perry%20handbook%20pdf
For 7 th edition:
http://www.filestube.com/b9dba76107f5b0ba03e9,g/Perrys-Chemical-Engineer-Handbook-7th-Edition.html

for 8 edition:
http://www.filestube.com/8L8sI7iS5V3BAqE22adIdx/Perry-s-Chemical-Engineer-Handbook-8E-2007.html