Wikimedi'Òc

Bulletin - United States National Museum (IA bulletinunitedst1061920unit).pdf - Fæ

Bulletin - United States National Museum (IA bulletinunitedst1651933unit).pdf - Fæ

Bulletin - United States National Museum (IA bulletinunitedst961917unit).pdf - Fæ

Proceedings of the Biological Society of Washington (IA proceedingsofb1071994biol).pdf - Fæ

Cecil county (IA cecilcounty00mary).pdf - Fæ

The underground water resources of the coastal plain province of Virginia (IA undergroundwater00sanf).pdf - Fæ

Maryland Geological Survey - reports dealing with the systematic geology and paleontology of Maryland (IA marylandgeo611916mary).pdf - Fæ

Maryland geological survey (IA marylandgeologic04mary).pdf - Fæ