The Alvaro Yunque Correspondence consists primarily of the correspondence of Alvaro Yunque with other writers and politicians in Argentina and Uruguay. The collection includes letters, notes, essays, and a few manuscript poems. The correspondence includes letters by Yunque to his wife, Alba Gandolfi, and his children, Alba and Adalbo. Alba Gandolfi is often addressed as a co-correspondent in the letters sent to Yunque by poets and other writers.

The collection contains Yunque's correspondence with many members of the Boedo group. These writers include Elías Castelnuovo, Leónidas Barletta, Gustavo Riccio, Aristobúlo Echegaray, Roberto Mariani, César Tiempo, and Delgado Fito. There is also extensive correspondence with other Argentine and Uruguayan writers, including Enrique Banchs, Arturo Capdevila, Raúl and Enrique González Tuñón (brothers), Manuel Gálvez, Fernán Silva Valdés, Juana de Ibarbourou and Roberto J. Payró. The collection also contains correspondence with Argentine politicians Alfredo L. Palacios, Carlos Sanchez Viamonte, and Rodolfo Ghioldi, and important literary critics Roberto F. Giusti, Rafael Alberto Arrieta, Raúl Larra, and Pedro Orgambide. Many of Yunque's works are discussed, such as Antología poética, Barcos de papel, Ta-te-tí, Versos de la calle, and Zancadillas. Yunque's political beliefs were leftist: he and Castelnuovo led the Boedo group in creating fiction with revolutionary themes. The collection includes three letters from leaders of the Partido Comunista celebrating Yunque's life and work. Yunque was interested in writing about children and though he intended his writing for an adult audience, young people also read his fiction. The collection is augmented by a group of papers from a celebration of Yunque's 80th birthday at the Dr. Jaim Zhitlovsky School in Buenos Aires.