Ŏngmanin ŭi sinang, 2006 (2007 printing) t.p. (Jon Obŭraiŏn [in Kor.]) pref. (author of "The faith of millions")
His Silent reading, 1921.
Ltr. fr. C. Ames, Notre Dame Univ. Libr., 2-23-89 (John A. O'Brien; prominent Roman Catholic author and pamphleteer; b. Jan. 20, 1893; d. Apr. 18, 1980; used "John A. O'Brien" on the bulk of his works)