host- virus ICTV classification important

http://www.mcb.uct.ac.za/tutorial/vf_fst-h.htm

host virus classification

http://biology.clc.uc.edu/courses/bio106/viruses.htm

virus and biochemistry

http://biology.clc.uc.edu/courses/bio106/viruses.htm

all subjects online content important NPTEL

http://nptel.ac.in/courses.php

general virology e chapters pdf important

http://nptel.ac.in/downloads/102103039/

virus hosts virus evolution e book

http://cvr.bio.uci.edu/files/2011/10/Book-10-28.pdf

Medical Microbiology 4th edition, Edited by Samuel Baron.

http://www.ncbi.nlm.nih.gov/books/NBK7627/