Binaries for Linux are available at Sunsite and its mirrors. The manual page for XView covers much of the basic information, but not the details for each component. A good reference is necessary to get the details for all the component attributes. If you're lucky, you might be able to find a bookstore with a copy, or perhaps someone at a local computer-fest may have a copy stored away. One tutorial book that might still be in the publisher's warehouse is Practical XView Programming , by Kenneth Bibb and Larry Wake, John Wiley and Sons.
Traffic is usually light on both, so it's easy to scan through the few articles that show up.