Introduction and first experiences with the business survey for architectures and engineers

Do response rates and responses differ between mail and internet answers in a mixed mode survey? : A comparison of qualitative business survey data collected by regular mail and internet questionnaires

Etter, Richard, (2002)

Information content of anticipations in the Swiss hotel + catering industry survey : paper presented at the CIRET-Workshop, October 1, 1991, Budapest, Hungary

Etter, Richard, (1991)

Innovationstätigkeit im Bau- und Dienstleistungssektor : Vorbereitung, Durchführung und Resultate einer Pilotumfrage

Etter, Richard, (1995)