McGraw Hill Trade Advertising 1927 By Melanie | November 7, 2013 McGraw-Hill Trade Advertising 1927 McGraw-Hill Trade Advertising 1927 Posted in CC License, Marketing and tagged 1927, McGraw-Hill ← Radiolaria – Marine Plankton Illustrations by Ernst Haeckel circa 1880Sea Star – Asteridea Illustration by by Ernst Haeckell →