I need help with the Helvetica-like sans from the book "A Laboratory for Art" published by Yale University Press. I can't figure out what it is, but I know what it isn't. It is not Helvetica or Helvetica Neue, Akzidenz Grotesk, Galaxie Polaris, Akkurat, Dada Grotesk, Digi Grotesk, National, FF Bau or Whitney. Any help would be great.