Winfred Ellerhorst

title	ISBN-13 (ISBN-10)	year of publication
Handbuch der Orgelkunde	978-90-6027-519-1 (90-6027-519-5)	1986
Handbuch der Orgelkunde, in 3 Bdn.	978-90-6027-515-3 (90-6027-515-2)	1986