Doing surveys online gan Toepoel, Vera

Doing surveys online gan Toepoel, Vera

Web survey methodology gan Callegaro, Mario, Lozar Manfreda, Katja, Vehovar, Vasja

Web survey methodology gan Callegaro, Mario, Lozar Manfreda, Katja, Vehovar, Vasja

The science of web surveys gan Tourangeau, Roger, Conrad, Frederick G. 1955-, Couper, Mick P.

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Conducting online surveys gan Sue, Valerie M.

Conducting online surveys gan Sue, Valerie M.