Absolutely astonishing collection. The publication "Sierra Maestra", for example, is extremely rare, so much that the Cuban Collection in Miami has maybe a couple of pages from the time it was published in New York, and maybe one issue from the Miami publisher. The other two major public repositories of Cuban primary sources are University of Florida, up in Gainesville, and Harvard, where a convention of teachers was held in 1901 and where an impressive Latin American Collection has been developing for the past century.
Rarely can we see such a complete documentation of materials used by the rebels in their attempt to seize power, which they finally did in 1959 as we all know.