Hi David,
Welcome to WikiTree! I can't answer your question, but I can provide some suggestions that might help you get more responses ...
I'd suggest adding the alternate surname spellings of the individual/family in question to the tags for your question (Kolb/Kulp/others?) to reach other possible collaborative researchers. Also, if you've found a profile here for the subject of the book that you mention (Dielman Kolb/Culp), I'd suggest editing your question to include that profile. And also for the book to which you're referencing, in addition to the image of the book cover which you've included, if it's available online, I'd suggest including a link to the actual book to which you're referring. Good luck!