@book{80413,
	author = {Sobhana, and Nyanaponika,},
	title = {The progress of insight through the stages of purification;},
	publisher = {Forest Hermitage,},
	year = {1965.},
	address = {Kandy, Ceylon,},
	note = {"The venerable Mahasi Sayadaw; a short biography": p. 34-35.}
}