Friedhelm Ahrens has written:
'Datenbanksysteme' -- subject(s): Database management, Information storage and retrieval systems
Friedhelm Baukloh has written: 'Baukloh;'
Friedhelm Burgard has written: 'Familia Archiepiscopi'
Friedhelm Hillebrand has written: 'GSM and Umts'
Art Ahrens has written: 'Chicago Cubs'
DONALD AHRENS has written: 'METEROLOGY TODAY'
Friedhelm Vohwinkel has written: 'Theorie des Geldes'
Hans Ahrens has written: 'Safe explosives of high power'
Friedhelm Beyersdorf has written: 'Anatomie' -- subject(s): Human anatomy
Friedhelm Mensing has written: '\\' 'Environmentally sound municipal and urban development'
Friedhelm Grundmann has written: 'Hamburg' -- subject(s): Pictorial works
Friedhelm Onkelbach has written: 'Lucas Lossius und seine Musiklehre'
Heinz Ahrens has written: 'Varianzanalyse' -- subject(s): Analysis of variance