Digital Public Library of America
https://dp.la/
DPLA connects people to the riches held within America’s libraries, archives, museums, and other cultural heritage institutions.
Internet Archive
https://archive.org/
Internet Archive is a non-profit library of millions of free books, movies, software, music, websites, and more.
Oregon Encyclopedia
https://oregonencyclopedia.org/
Provides definitive, authoritative information about all aspects of the State of Oregon, including significant individuals, places, cultures, institutions, events, and peoples.