The Hispanic Society of America Museum and Library Has extensive holdings of early printed books (15,000+ printed before 1701) and 250 incunabula (printed before 1500) on Spanish literature and history. Also holds collections of imprints from Latin America including many editions of works by Sor Juana Inés de la Cruz. Limited information is available online; consult some of the published printed catalogs and lists and/or contact the Hispanic Society Library for more information.
Rare Book Division, New York Public Library