著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL United States. Bureau of the Census,"State compendium : Maryland : statistics of population, occupations, agriculture, manufactures, and mines and quarries for the state, counties, and cities",,Government Printing Office,1924,Fourteenth census of the United States taken in the year 1920,,,,https://cir.nii.ac.jp/crid/1130577121819029540