It was during that period, he published, with Byron Buck, Know Your Reader: The Scientific Approach to Readability. This work introduced to the public the extensive research behind the popular readability formulas of the likes of Rudolf Flesch and Robert Gunning.
Rudolf Nureyev | Rudolf Steiner | Rudolf Virchow | Rudolf Hess | Rudolf II, Holy Roman Emperor | Rudolf Kempe | Rudolf Hilferding | Rudolf | Rudolf Schwarz | Rudolf Haag | Rudolf, Crown Prince of Austria | Rudolf Schwarz (conductor) | Rudolf Platte | Rudolf Nebel | Rudolf Carnap | Rudolf Thurneysen | Rudolf Stingel | Rudolf Serkin | Rudolf II | Rudolf Bultmann | Rudolf Baumgartner | Carl Flesch | Rudolf von Jhering | Rudolf Scharping | Rudolf Otto | Rudolf (musical) | Rudolf Kreitlein | Rudolf III, Duke of Saxe-Wittenberg | Rudolf Hruska | Rudolf Flesch |
Widely-known whole language detractors include Louisa Cook Moats, G. Reid Lyon, James Kauffman, Phillip Gough, Keith Stanovich, Diane McGuinness, Douglas Carnine, Edward Kame'enui, Jerry Silbert, Lynn Melby Gordon, Rudolf Flesch, and Jeanne Chall.