found: LCCN 53-60029: His Cataloging rules and principles, 1953(hdg.: Lubetzky, Seymour)
found: LC data base, 5-25-83(hdg.: Lubetzky, Seymour)
found: Email forwarded from UCLA, 1-29-97(Seymour Lubetzky; b. Apr. 28, 1898, Zelwa, Poland (then part of Russia); UCLA honors his 100th birthday next April; Professor Lubetzky will be on hand to contribute to the proceedings)
found: MLA-L, Apr. 7, 2003(Seymour Lubetzky; d. Apr. 5, 2003)
found: N.Y. times, Apr. 13, 2003(Seymour Lubetzky; librarian; b. Shmaryahu Lubetzky in Zelva, now Belarus; d. last Saturday [Apr. 5] in Los Angeles, aged 104)