Frits Sieger has written:
'Zeugen der Zeit' -- subject(s): Exhibitions, Socialism and art
Frits. has written: 'Schakeringen'
Frits Veerman has written: 'Atoomspionage'
Sieger van der Laan has written: 'De militaire organisatie' -- subject(s): Armed Forces
Marcus Sieger has written: 'Die Heiligsprechung' -- subject(s): Canonization, History, Canon law, Interpretation and construction, Ecclesiastical law
Frits Barend has written: '2 x 45 minuten' -- subject(s): Athletes, Interviews
Frits Lugt has written: 'Les marques de collections de dessins et d'estampes'
Frits Conijn has written: 'Dirk Scheringa' -- subject(s): Bankers, Biography, DSB Bank
Frits Kuiper has written: 'Dorst naar recht' -- subject(s): Zionism, Jewish-Arab relations
Frits C. Weiland has written: 'Elektronische muziek' -- subject(s): Electronic music, History and criticism
Frits de Vries has written: 'Wettelijke limitering van aansprakelijkheid' -- subject(s): Damages, Limited liability
Frits L. Regter has written: 'Schoonmaken in musea, archieven en historische gebouwen' -- subject(s): Museums, Cleaning, House cleaning
Frits Florin has written: 'Den illegale kirke' -- subject(s): Christianity, Christianity and other religions, Church renewal, Essence, genius, nature, Faith