M8 Rocket Schema
United States Army
Book:  "U. S. rocket ordnance, development and use in world war II." Washington, U. S. Govt. print. off., 1946 <a rel="nofollow" class="external autonumber" href="http://babel.hathitrust.org/cgi/pt?id=uiug.30112003608368;view=1up;seq=12">[1]</a>, cropped and translated by Uploader