==Selected bibliography==*1960 "Studies in the Indo-European System of Numerals", Heidelberg*1964 "Syncope in Greek and Indo-European and the Nature of Indo-European Accent", Napoli*1970 "Einführung in die vergleichende Sprachwissenschaft", Darmstadt**1989 3., vollständig neu bearbeitete Auflage**1996 "Introduction to Indo-European Linguistics", Oxford*"Richtungen der modernen Sprachwissenschaft"**1971 "Teil I: Von Saussure bis Bloomfield, 1916-1950", Heidelberg**1982 "Teil II: Die fünfziger Jahre, 1950-1960", Heidelberg*1972 "Comparative Linguistics" (Current Trends of Linguistics)*1977 "Studies in the Kinship Terminology of the Indo-European Languages", Leiden*1980 "Four Old Iranian Ethnic Names: Scythian - Skudra - Sogdian - Saka", Vienna*"Scripta Minora: selected essays in Indo-European, Greek, and Latin", edited by Patrick Considine and James T. Hooker, Innsbruck,** 1987 Vol.
* 1960 "Studies in the Indo-European System of Numerals", Heidelberg* 1964 "Syncope in Greek and Indo-European and the Nature of Indo-European Accent", Napoli* 1970 "Einführung in die vergleichende Sprachwissenschaft", Darmstadt** 1980 "Введение в сравнительное языкознание", Москва (ISBN 978-5-354-00056-2, ISBN 978-5-354-01230-5)** 1989 3., vollständig neu bearbeitete Auflage** 1996 "Introduction to Indo-European Linguistics", Oxford* "Richtungen der modernen Sprachwissenschaft"** 1971 "Teil I: Von Saussure bis Bloomfield, 1916—1950", Heidelberg** 1982 "Teil II: Die fünfziger Jahre, 1950—1960", Heidelberg* 1972 "Comparative Linguistics" (Current Trends of Linguistics)* 1977 "Studies in the Kinship Terminology of the Indo-European Languages", Leiden* 1980 "Four Old Iranian Ethnic Names: Scythian — Skudra — Sogdian — Saka", Vienna* "Scripta Minora: selected essays in Indo-European, Greek, and Latin", edited by Patrick Considine and James T. Hooker, Innsbruck,** 1987 Vol.