Books by Isaac ben Jacob Benjacob:
Books in the extended shelves:
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Benjacob, Isaac ben Jacob, 1801-1863: Ozar ha-sepharim. Thesaurus librorum hebraicorum tam impressorum quam manu scriptorum. (Vilnius (Lithuania), 1880), also by Moritz Steinschneider and Jacob Benjacob (page images at HathiTrust)
Find more by Isaac ben Jacob Benjacob at your library, or elsewhere.