@book{28776,
	author = {Kummel, Bernhard,},
	title = {American Triassic coiled nautiloids.},
	publisher = {U.S. Govt. Print. Off.,},
	year = {1953.},
	address = {Washington :},
	note = {"A study of the classification and evolution of late Paleozoic and early Mesozoic cephalopods, and description of new species."}
}