Former Owner
- Katherine Somerset Wyttenbach Fenwick2
- Kloster Rebdorf1
- Lathrop C. Harper, Inc.1
- Lathrop Colgate Harper1
- Lawrence J. Schoenberg1
- Lewis L. Gould2
- Librairie Tross1
- London School of Jewish Studies1
- Louis H. Silver1
- Ludwig Rosenthal2
- Ludwig Rosenthal's Antiquariaat1
- Luigi Celotti1
- Maggs Bros Ltd4
- Margaret Barclay Wilson1
- Marienstiftsgymnasium1
- Mark Lansburgh1
- Mary W. T. Dickinson2
- Matthaeus Lupin1
- Matthew Donadski1
- Melchior Daniel Neubronner1