Questions about a manual, a correction to a page, or literature you would like to contribute: send a note and we will reply by email.
If your message concerns a particular manual, include its title, make and year, or paste the address of the page you were reading. For contributions, a line about what you have and whether it is an original or a scan is enough to start.
Looking for a manual rather than a person? The library index can be narrowed by make, model, year and type, and every manual page has a search box that looks inside the book.