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- 21012894 contributor B611748.
- 21012894 created "1921]".
- 21012894 date "1921".
- 21012894 date "1921]".
- 21012894 dateCopyrighted "1921]".
- 21012894 description "Thesis (Ph. D.)--University of Chicago, 1917.".
- 21012894 extent "15 p.".
- 21012894 issued "1921".
- 21012894 issued "1921]".
- 21012894 language "eng".
- 21012894 publisher "[Easton, Pa.,".
- 21012894 subject "Barium.".
- 21012894 subject "Mesothorium.".
- 21012894 subject "QC721 .S83".
- 21012894 subject "Radium.".
- 21012894 title "The isotopism of mesothorium and radium and the separation of these elements from barium ... by Ralph Kempton Strong ...".
- 21012894 type "text".