This volume will detail the freight diesel locomotives not covered in the previous volumes of Shade Tree's series of books on Southern Pacific's diesel locomotive roster. This volume will have color covers and all B&W images inside.
Introduction, pp. 3-7;SD35, Original and 1965 Numbers, pp. 8-27;SD35, Upgrades and Switchers, pp. 28-45;SD39, pp. 46-67;SD38-2 (West Colton Hump Units), pp. 68-75;West Colton Slug Units, pp. 76-81;GP38-2, pp. 82-113;SD70M, pp. 114-131;Demonstrators and Graduates (new owners), pp. 132-144
Shade Tree Books, softcover, 146 pages, standard portrait book 8 x 10 in., B&W photographs, a complete roster and detailed photograph captions.