سلام ببحشید کتاب زیر رو لطف کنید
http://www.homeshop18.com/partial-differential-equations-scientists-engineers/author:mathematics/books/miscellaneous/product:20146437/cid:14567
Partial Differential Equations for Scientists and Engineers by Stanley J. Farlow
اینم لینک و عنوان
http://eprints.utm.my/8013
Re-refining of base oil from spent lubricant : a comparative study between laboratory and pilot scale study