Mail and Telephone Surveys: the Total Design Method
Dillman, Don A
Mail and Telephone Surveys: the Total Design Method Don A Dillman - - New York John Wiley & Sons, Inc 1978 - 324p.
001.433 / DIL
Mail and Telephone Surveys: the Total Design Method Don A Dillman - - New York John Wiley & Sons, Inc 1978 - 324p.
001.433 / DIL