@book{15018,
	author = {Sarma, Y. R. and Chakrborty, R. and Chakrborty, R. ; jt. auth.},
	title = {Some statistical models for human multiple births},
	publisher = {Indian Statistical Institute},
	year = {1969},
	series = {ISI, RTS Technical Report no. Mathematical Statistics 52/69},
	address = {Calcutta}
}