@book{164009,
	author = {EMERSON, E. and HATTON, C.},
	title = {SOCIOECONOMIC POSITION, POVERTY, AND FAMILY RESEARCH. EN: FAMILIES. INTERNATIONAL REVIEW OF RESEARCH IN MENTAL RETARDATION, VOL. 37},
	publisher = {ELSEVIER},
	year = {2009},
	address = {Londres}
}