This title is a wealth of data. Yes, it covers these classes of boxcars. Three diagrams are basically lettering diagrams but they show a general diagram of the cars (3). One of the diagrams shows the lettering and door for REA. There is a roster and a general discussion throughout the book of SP boxcars including this class. One reproduced diagram is quite rough as the original was quite dirty so some notes in the lower right corner are unreadable. The book is only as good for diagrams as was found/available. These are older cars so it is good that what could be found was published.