Quoted By:
-Mobile Suit Gundam Illustrated, whatever eidtion
-any of the MOVIC A Collection books dedicated to particular mecha designers (i own the Izubuchi volume 1 and Okawara's Votoms+Dougram book)
-Shoji Kawamori Design Works
-WXIII Patlabor The Movie 3 (contains a metric shitton of lineart from movie 3 as well as OVA 2)
-Newtype Film Books are always a great source
and that's all i have in my head right now