Environmental history is interdisciplinary. So, you may need to search databases for anthropology, ecology, and so on. Either try an interdisciplinary search like LibrarySearch+ or Scopus, or look for a specialized database listed on our subject guides.
The following links lead to Library of Congress subject heading searches in LibrarySearch. These same subject headings can find relevant books in any academic library catalog.
Using the Advanced Search function in LibrarySearch, you can combine any of these with other terms, such as geographic terms like (Maine OR New England OR Atlantic States), or (History), or kinds of sources like (bibliography OR guidebooks) or (correspondence OR diaries)
Though you will probably start with LibrarySearch, don't end there.
Collection is full text searchable. Materials in the public domain are available for reading online. Copyrighted materials are not available in full text, but often indicate page numbers where words occur. Includes many US government documents. hathi trust
For a more expansive list of primary sources, see United States History: Primary Sources. See also Lewiston History for local archives and collections.
The Congressional Record, first published in 1873, is essentially the complete printed version of debates, proceedings and speeches of the United States Congress. Previously congressional debates were catalogued in the Annals of Congress (1789-1824), Register of Debates (1824-1837) and Congressional Globe (1833-1873). The American State Papers are a collection of 6,278 documents in 38 volumes comprising the legislative and executive documents of the first fourteen Congresses from 1789 to 1838. The Journals of the Continental Congress are the records of daily proceedings of the Continental Congress, as kept by Secretary Charles Thomson.
Collection is full text searchable. Materials in the public domain are available for reading online. Copyrighted materials are not available in full text, but often indicate page numbers where words occur. Includes many US government documents. hathi trust
See United States History: Primary Sources research guide.