@book{7009,
	author = {Gabler, Robert E.},
	title = {Essentials of Physical Geography /},
	publisher = {Saunders College Pub.,},
	year = {c1999.},
	series = {Saunders golden sunburst series},
	address = {Fort Worth :},
	edition = {6th ed.},
	note = {Rev. ed. of: Essentials of physical geography / Robert E. Gabler, Robert J. Sager, Daniel L. Wise. 5th ed. c1997.},
	url = {http://www.loc.gov/catdir/enhancements/fy1409/98087953-t.html}
}