@book{26750,
	author = {Chao, Ya-tsʻêng,},
	title = {Carboniferous and Permian spiriferids of China,},
	publisher = {Geological survey of China,},
	year = {1929.},
	address = {Peiping (Peking)},
	note = {Added t.-p. and summary in Chinese. Summary paged with Chinese numerals.}
}