Hi All!
L-137---twin engine bombardment airplane proposal
L-145---commercial transport proposal, DC-3 replacements
L-147---small commercial transport proposals
L-152---medium size turboprop or turbojet commercial transport proposals
L-153---XP/F-90
L-155---commercial jet-engined transport proposals
L-179---jet-engined commercial transport proposals
L-183---USN Specification OS-113 (became XF3H-1), interceptor fighter proposals
L-185---commmercial transport proposals, "DC-3 replacement"
L-186---jet-engined commercial transport proposals
L-187---USN Specification OS-111 (became XA3D-1), long-range carrier-based bomber proposals
L-188---several projected modifications of the F-97 nee F-94C fighter
L-189---"A specific aircraft was not designed in this preliminary study for ONR. It was a generalized data generation program for carrier based ASW aircraft to be operational in 1956."...
L-190---USAF interceptor proposals
L-191---"It was a strategic turbojet engine bomber system; a system called "team bombing." Team bombing was to be use of two aircraft-one was to be a manned guide aircraft and the other a remotely controlled bomb carrier that would fly only to the target and then be expendable."...
L-192---USN Specification OS-117 (became XS2F-1), anti-submarine warfare airplane proposals
L-195---nuclear engine powered aircraft proposals
L-197---ASW helicopter proposals
L-200---XFV-1
L-201---commercial transport airplane proposals, DC-3 replacement
L-202---day fighter proposals
L-203---liason aircraft proposals, request of AMC. Tail seater...
L-207---commercial transport proposals, DC-3 reolacement
L-208---XC-Heavy Transport and Parasite/Missile carrier airplane proposals, request of AMC
L-209---parasite bomber airplane proposals
L-210---ground attack fighter proposals
L-212---nuclear engine powered aircraft proposals.
Source: Journal, American Aviation Historical Society, 1999, Summer: page 102-112, Winter: page 288-297. 2000, Spring: page 53-63
I have only copy and I do not have a scanner.