@book {73,
	title = {The Hill Tribes in Northern Thailand},
	year = {1962},
	publisher = {Siam Society},
	organization = {Siam Society},
	chapter = {1-132},
	address = {Bangkok, Thailand},
	author = {Young, G.,}
}
@article {11,
	title = {The Athyrioid ferns of Ceylon},
	journal = {Bulletin of the Natural History Museum. Botany seriesBulletin of the Natural History Museum. Botany series},
	volume = {2},
	year = {1962},
	pages = {277-323},
	author = {Sledge, W. A.,}
}
