@book{4391,
	author = {Gregory, Olinthus,},
	title = {Mathematics for practical men: being a common-place book of principles, theorems, rules, and tables, in various departments of pure and mixed mathematics,},
	publisher = {E. L. Carey and A. Hart,},
	year = {1836.},
	address = {Philadelphia,},
	edition = {2nd American from the 2nd London ed., cor. and improved ...},
	url = {http://hdl.loc.gov/loc.gdc/scd0001.00055944428}
}