You'll definitely want to use Sunshine, Citrus and Science by Keld Reynolds. Your best source will probably be the online searchable database at the Del E. Webb Library Heritage Room, Loma Linda University.
Students can conduct online searches under topics or names.
The photos are copyrighted by the University, but searching and looking is certainly worthwhile. You can look at these images without fees or permission. Permission would need to be sought from the Heritage Room to copy or use the images. If you can project computer images to your TV or a projector, a substantial lesson could be developed with pictures of Loma Linda pioneers or historic buildings and places. Several thousand pictures have already been placed on the database, with more on the way.