I picked up several extras at a recent auction. Servicemen's Reference Book Diesel Engines (4" Bore 4-Cylinder) D311, D2 Tractor, 212 Motor Grader dated 5/58. Servicemen's Reference Book D2 Tractor dated 7/53. Both of these books are in good condition but have heavily soiled covers and a few oily fingerprints inside. Also have a near new condition parts book for D2 Tractor effective with Machine No. 5J3501 dated 2/41. Above books $35 each postpaid in U S. Also have #2A & #2S Hydraulic Bulldozer parts book dated 6/57, $10 postpaid. My email is on profile or call 208-743-3622.