@book{38265,
	author = {International Congress on Carboniferous and Permian Geology and Stratigraphy and Museo Argentino de Ciencias Naturales "B.Rivadavia"},
	title = {XII International Congress on Carboniferous and Permian Geology and Stratigraphy :},
	publisher = {Museo Arg.Cs.Ns."B.Rivadavia",},
	year = {1991.},
	address = {Buenos Aires :}
}