18th Missouri, "The Eighteenth Missouri," by Leslie Anders. Published in 1968 at Indianapolis, Indiana, this book costs around $ 50.00.
http://www.mosocco.com/missouri.html

Available at abebooks.com for $2.20 + postage. http://www.abebooks.com/servlet/SearchResults?sts=t&tn=The+Eighteenth+Missouri&x=82&y=7

George Martin