Oppenheim, A.N.
Questionnaire design, interviewing and attitude measurement - London Printer Publishers 1992 - 303p.
1855670437
SOCIAL SURVEYS
308(079.5) / O6
Questionnaire design, interviewing and attitude measurement - London Printer Publishers 1992 - 303p.
1855670437
SOCIAL SURVEYS
308(079.5) / O6