41b2ed06__Census_1820___Social_Explorer__Column_18_2
[Column 18] fireman [Column 19] lumber mill [Column 19_3] truck farm [Column 18_2] 
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Census Questionnaires and Instructions: 1790 to 2000 - Measuring America: The Decennial Censuses From 1790 to 2000 - Survey Census 1820 - Social Explorer