Many of our books about the organ are bibliographies. Under this number on the music reference shelves, you will find many detailed bibliographies providing information such as lists of organ music in print and music for organ plus various other instruments:
ML 128 .O6
Other books, found on the regular shelves:
Organ construction:
ML 550, ML 552
Biographies of organists: ML 416
History of the organ: ML 549 - ML 647
Books about organ literature: ML 600