@book{568158,
	author = {Oppenheim A N},
	title = {Questionnaire design and attitude measurement},
	publisher = {Heinemann          },
	year = {1966},
	series = {Heinemann books on sociology. Ed by donald Gunn MacRae},
	address = {London},
	note = {Appendix P 261-89; Bibiliography at the end of each chapter}
}