"National Multiple Sclerosis Society (U.S.). Houston Area Chapter." . . "Group Practice Texas." . . "University of Texas Centennial Commission." . . . . "Partnership Practice Texas." . . . . . . . . . . . "Papers of William D. Seybold, M.D. : manuscript collection no. 4 in the Harris County Medical Archive"@en . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "Working papers of Dr. William Dempsey Seybold document his career from late in his surgical residency to his retirement from private practice in 1979. Collections's unpublished guide."@en . . "Physicians Texas." . . "Hospital Administration Texas." . . "University of Texas Committee of 75." . .