@mastersthesis {291,
	title = {Radular structure in the gastropod order Neritopsina: A source of phylogenetic information},
	volume = {Ph.D.},
	year = {1996},
	pages = {153},
	school = {University of Hawaii},
	author = {Unabia, C.R.C.}
}
@mastersthesis {294,
	title = {Evolution between marine and freshwater habitats: a case study of the gastropod suborder Neritopsina},
	volume = {Ph.D.},
	year = {1995},
	pages = {286},
	school = {University of Washington},
	type = {Dissertation},
	author = {Holthuis, B.}
}
