The papers document activities of J. M. Portuondo in capacity of a professor of Internal Medicine at the University of Havana, a writer and a faculty member of the University of Miami School of Medicine.  The materials include books, pamphlets, periodicals, clippings, circular letters, typescripts of anti-communist writings by Portuondo, reports, a poem by Portuondo, speeches by him, copies of his medical diplomas, a historical map of Havana, and photostats of a photograph and of a letter from José Martí to José Portuondo.

The papers consist of albums with photographs, clippings and memorabilia related to the 25th anniversary celebration of Spanish newspaper "La Tribuna de North Jersey". Carlos G. Bidot and his wife Lydia were the founders of this publication.