==External links==* Vintage Wings of Canada Canadair North Star showing RR Merlin installation* "Life" magazine photos by Eliot Elisofon of first production batch of DC-4s being completed (partly outdoors) as military C-54s (note absence of cargo door on these), and including early air-to-air photos of 42-10237 the first DC-4/C-54 to fly
ISBN 0-517-44287-6.