Dillman, Don A.
Mail and Internet surveys : the tailored design method / Don A. Dillman. - 2nd ed. - J. Wiley 2000.
13770
Social surveys
Questionnaires
HM538 / Dil
Mail and Internet surveys : the tailored design method / Don A. Dillman. - 2nd ed. - J. Wiley 2000.
13770
Social surveys
Questionnaires
HM538 / Dil