help to find a books on hvac and plumbing?

Question

manuals/books on plumbing,hvac. in what web site that offers free or in lower rates to buy those books.
or any of the one saw this question and you have that books feel free to send it to me, i need that for my thesis writing.
thanks.

my e-mail adds , [e-mail]

Answer 1

This site has a selection

http://www.contractorguides.com/mectrad.html

Amazon
http://www.amazon.com/Plumbing-Hvac-Manhour-Estimates-Competitive/dp/1572180412

http://www.amazon.com/National-Plumbing-Hvac-Estimator-
2004/dp/1572181354

Alibris
http://www.alibris.com/search/search.cfm?S=R&qwork=5174607&qsort=p&siteID=KLVmR9fE2yU-orBih23ZeaLFQCQUgLCeIg

I have good luck at Half price books , check to see if they have a store by you or you can find some books online.