I have several booklets from communities that had their 100th year celebration, or some such event. They all list a *lot* of great information and include pictures with names and local details. In this one booklet, it includes the names of the town mayors and other public officials for the prior 50 years. I will attach it to my family member that is referenced in the document, but my question is, should I take the time to see if there are Wiki pages for others listed in the booklet and include the source? Do these kind of booklets count as sources?