> Multivolume work
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An index to the early printed books in the British Museum Part 2 MDI-MDXX Section 1 = Vol. 3 Germany by Robert Proctor
London: Kegan Paul, Trench, Trübner & Company, 1903
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An index to the early printed books in the British Museum Suppl. 1902 by Robert Proctor
London: Paul, Trench, Trübner, 1903
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An index to the early printed books in the British Museum Suppl. 1901 by Robert Proctor
London: Paul, Trench, Trübner, 1902
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An index to the early printed books in the British Museum Suppl. 1900 by Robert Proctor
London: Paul, Trench, Trübner, 1901
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An index to the early printed books in the British Museum Suppl. 1899 by Robert Proctor
London: Paul, Trench, Trübner, 1900
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An index to the early printed books in the British Museum [Part 1, 1/4. section] = [Vol. 1/2] From the invention of printing to the year MD, with notes of those in the Bodleian Library by Robert Proctor
London: Kegan Paul, Trench, Trübner and Company, 1898