^ The color displayed in the color box above matches the color called mustard in the 1930 book by Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill;the color mustard is displayed on page 45, Plate 11, Color Sample J4.
^ Maerz and Paul A Dictionary of Color New York:1930 McGraw-Hill Page 199; Color Sample of Mustard: Page 45 Plate 11 Color Sample J4
^ Andrews, Vincent (2010), The Leatherboy Handbook, The Nazca Plains Corp.,
ISBN978-1-61098-046-3