New Dr Suess Inward Advertising (In The 20S Together With 30S He Worked For Criterion Oil)
“Meet the Zero-doccus. He is the commence if a grouping of terrible beasts that are beingness turned liberate inwards the advertising of Essolube, Standard Oil Company (New Jersey) products,” reports the Dec 8, 1932, Printers’ Insider, an advertising merchandise journal.
http://www.collectorsweekly.com/articles/when-the-wild-imagination-of-dr-seuss-fueled-big-oil/
http://aoghs.org/editors-picks/seuss-the-oilman/