@book{20111,
	author = {SUBRAMANYA,K / LAL, B. / AVADHANULU,M.N},
	title = {SURVEYING AND LEVELLING},
	publisher = {OXFORD UNI.PRESS NEW DELHI},
	year = {2007 R.P.2017},
	edition = {2ND},
	note = {RBPL78614/19-20}
}