Home › Authors › Clarence Howard Hoffmann 👤 Clarence Howard Hoffmann b. 1908 ยท 2 books Books by Clarence Howard Hoffmann A twig droop of white pine cau A twig droop of white pine caused by Pineus 1947 The biology and taxonomy of th The biology and taxonomy of the genus Trichiotinus (Scarabaeidae-Coleoptera) 1935