@book{28177,
	author = {Anas Badr Naqvi, M. Wamiz-ul-Haq, S. Rizwan Hasnain & Wasif Siddiqui},
	title = {Programmable Logic Controller Based Automation of Pipe Cutting Machine},
	publisher = {UIT,},
	year = {2004},
	address = {Karachi:}
}