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Descriptive and sampling statistics
Peatman, John Gray, (1947)
Graphical methods in non-response analysis and sample estimation
Bethlehem, Jelke G., (1981)
Beschreibende Statistik und Wirtschaftsstatistik : mit 2 Tabellen
Mosler, Karl C., (2003)
Common carriers' entry into multimedia services
Colombo, Massimo G., (1997)
Colombo, Massimo G., (1998)
Technological cooperative agreements and firm's R&D intensity : a note on causality relations
Colombo, Massimo G., (1996)