His From vital force to structural formulas, c1959.
Classics in the theory of chemical combination, 1981, c1963 t.p. (O. Theodor Benfey)
His Friends and the world of nature, 1980 t.p. (Theodor Benfey) t.p. verso (Ted Benfey, teaches chem. & hist. of science at Guilford College, N.C.; b. in Germany)
Phone call to author, 5/8/81 (Theodor Benfey is a variant form of his name)