Topic summary
Libreta
Extracted from the Wikipedia article Rationing in Cuba.
Rationing process
Products distributed through the libreta mechanism are sold at subsidized prices, which have been kept more or less stable since its inception (the mean salary of a worker has varied very little since, as well). The libreta contains a page for every month, where the clerk marks what products were withdrawn, and in which quantities. Cubans are required to present the libreta each time they buy the rations.