- I. Blaeu; Amstelaedami (1)
- I. E. Ilgenfritz Sons Co. (The Monroe Nursery), (Monroe, Michigan) (1)
- I. Lapina (1)
- I. Lapina, Imp (1)
- I. Luffman (London) (2)
- I. Luffman (London), 1813 (1)
- I. Stockdale (London) (1)
- I.Reed Books (New York), 1979 (1)
- Ibidean Company? (Minneapolis, Minn) (1)
- Icones plantarum sponte nascentium . . . Florae danicae. Copenhagen: N. Moller (Copenhagen) (1)
- Igleheart Bros (Evansville, Ind, 1925) (1)
- Il disegno del discoperto della noua Franza, ilquale s'è hauuto ultimamente dalla nouissima nauigatione dè Franzesi in quel luogo, nel quale si uedono tutti l'Isole, Porti, Capi, et luoghi fra terra chein quella sono. [Venice : Antonio Lafreri, 1566] (1)
- Illinois Litho. Co. (1)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1876 (3)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1877 (52)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1884 (10)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1885 (8)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1886 (6)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1887 (7)
- Illustrated Police News Publishing Company (Boston, Massachusetts), 1890 (2)
