Internet saytlari
1.
www.ziyonet.uz
2.
www.colibri.ru
3.
www.bmti.uz
4.
www.books.econprofi.ru
5.
www.chem.msu.su.ru
6.
www.e-lib.uz
7.
www.chem.msu.su.ru
8.
www.referat.uz
9.
www.rusoil.neft/ katalizator/russian/book1
10.
www.astu.org/education/institutes
11.
www.rusoil.net/russian/science/book1
12.
www.licenzirovanie.narod.ru
