@book{145946,
	author = {Pavlides, Louis},
	title = {Early Paleozoic alkalic and calc-alkalic plutonism and associated contact metamorphism, central Virginia Piedmont},
	publisher = {U.S. G.P.O.},
	year = {1993.},
	series = {U.S. Geological Survey professional paper},
	address = {Washington}
}