@article {berry1962growth,
	title = {The growth of Opisthostoma (Plectostoma) retrovertens Tomlin, a minute cyclophorid from a Malayan limestone hill},
	journal = {Journal of Molluscan Studies},
	volume = {35},
	number = {1},
	year = {1962},
	pages = {46{\textendash}49},
	publisher = {Malacological Soc London},
	author = {Berry, AJ}
}
@article {berry1963growth,
	title = {Growth and variation of the shell in certain malayan limestone hill snails},
	journal = {Journal of Molluscan Studies},
	volume = {35},
	number = {5},
	year = {1964},
	pages = {203{\textendash}206},
	publisher = {Malacological Soc London},
	author = {Berry, AJ}
}
