place
puerto rico: explore 1 source-linked works published from 1924 to 1924, with original documents and citations.
This collection is a preview while coverage and quality are evaluated.
Includes records with this source-supplied label or an explicit phrase match in their metadata. Matches indicate a mention, not proof that a paper uses a method or tests a material. Source versions are consolidated by DOI.
Sources: loc. Collection updated 2026-09-18. Counts describe this index, not the complete source archives.
Shows location of stations (centrales) where sugar cane was delivered for processing. Includes list of operating railroads in Puerto Rico. Available also through the Library of Congress web site as a raster image.