To find English translations by subject, do keyword searches in HOLLIS or WorldCat, e.g.,
Subject: Cuba description travel
--limited to English.
Index Translationum (1979- ) is a worldwide list of translated books.
A particular source may be included in a collection of primary sources and not individually named in the HOLLIS/WorldCat record. For example:
Latin American independence: an anthology of sources, edited and translated by Sarah C. Chambers and John Charles Chasteen. Indianapolis: Hackett Pub. Co., 2010, 248 p.
Self-determination, National -- Latin America -- History -- 19th century -- Sources.
Latin America -- History -- Wars of Independence, 1806-1830 -- Sources.
Search for these by searching with Subject terms for your topic plus the term Sources in a Subject search in HOLLIS Advanced Search.