1938 GMC 4x4

[David_Hayward (RIP)]

Does anyone have a copy of Bart's HISTORICAL MILITARY VEHICLES DIRECTORY please? I am trying to find the Model Number of the 1938 GMC 4 x4 trucks...Bart mentions 4929 for the '38 6 x 6 on P. 10 WHEELS & TRACKS 25..."(see AVD, page 330)" he said...which I assume meant HMD? The British WD Trialled a '38 GMC 4 x 4 tractor and I need to clarify which model.

Thanks!