Zafar, Iqbal creator Sajid, Muhammad Sohail Abdul Jabbar Rao, Zahid Abbas Khan, Muhammad Nisar text islamabad] HEC 2006 monographic 198 P Parasitology 9694170893 http://www.amazon.com/exec/obidos/ASIN/B003P13JQ8/chopaconline-20 http://www.amazon.com/exec/obidos/ASIN/B003P13JQ8/chopaconline-20