Other
Genealogy
Floods--Pennsylvania--Johnstown (Cambria County)
2
Forest nurseries
2
Ironwork
2
Land surveys
2
Pennsylvania--Genealogy
2
Pennsylvania--Surveys
2
Stenographers
2
Surveying
2
Alchemy
1
Burial records
1
Genealogical correspondence
1
Genealogists--Research
1
Genealogy & local history
1
Genealogy--Family trees
1
Mathematics--Problems, exercises, etc
1