What has the author Dorothi Mary Griffith written?

Dorothy Amburgey Griffith has written:

'1850 & 1880 U.S. censuses, Letcher Co., Kentucky' -- subject(s): Census, 10th, 1880, Census, 1850, Census, 1880, Census, 7th, 1850, Genealogy, United States, United States. Bureau of the Census