@book{30731,
	author = {Allen,R.G.D.; Bynner J.M},
	title = {Mathematical analysis for economist BK.; Social research:principles and procedures; Social research:principles and procedures/ed by J.Bynner and K.M.Stribley.},
	publisher = {A.I.T.B.S; Longman},
	year = {1978.0},
	address = {Harlow; New Delhi}
}