@article {4499,
	title = {The Studies of Chinese Ferns-XXXIII},
	journal = {Lingnan Science Journal},
	volume = {21},
	year = {1945},
	author = {R. C. Ching}
}
@article {4498,
	title = {On the Genus Onychium Kaulf. from the Far Orient1},
	journal = {Lingnan Science Journal},
	volume = {13},
	year = {1934},
	author = {R. C. Ching}
}
@article {2490,
	title = {On the Genus Onychium Kaulf. from the Far Orientl},
	journal = {Lingnan Science Journal},
	volume = {13},
	year = {1934},
	author = {R. C. Ching}
}
@article {2176,
	title = {New and Little Known Ferns from China and Neighbor},
	journal = {Lingnan Science Journal},
	volume = {15},
	year = {1936},
	author = {R. C. Ching}
}
