I have found a lot of wisdom and interesting approaches from old classic beekeeping books.
Here are some links to some online digital archives:
- The Hathitrust Digital Library - https://www.hathitrust.org/
- The Hive and the Honeybee - https://digital.library.cornell.edu/collections/bees
- The Internet Archive - https://archive.org/
- The Biodiversity Library - https://www.biodiversitylibrary.org/
- Google Books - https://books.google.com/