@book{29986,
	author = {Wolf, Paul R.},
	title = {Elementary Surveying},
	publisher = {National Book Foundation},
	address = {Islamabad},
	edition = {8th},
	url = {https://libgen.is/book/index.php?md5=6D1287E37B9F6057E4E23ED05F1D3F15}
}