Yes, it can be difficult. We provide as much information as we can. Sometimes searching can be quite a slog. Keep in mind, also, that not all patterns are yet to be entered to the DB. If you have suggestions or questions, you can contact the DB General Editor through the website Contact Us feature. I assume you are referring to Pictorial Souvenirs & Commemoratives of North America 1976? We have it in our personal library. It has been used as a reference in 24 of the DB entries.