@book{31018,
	author = {Hyman, Libbie Henrietta},
	title = {Invertebrates},
	publisher = {McGraw-Hill Book Company, Inc., },
	year = {1951},
	address = {New York: },
	note = {Vol. 2 (Platyhelminthes and rhynchocoela: the acoelomate bilateria); vii, 549p.
Vol. 3 (Acanthocephala, aschel minthes, and entoprocta:  the pseudocoelomate bilateria); vii, 572p.}
}