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Ritt, Joseph Fels, 1893-1951. (Personal Name)
LCCN 48-2225: His Integration in finite terms, 1948 (hdg.: Ritt, Joseph Fels, 1893-1951)
LC data base, 4-18-90 (hdg.: Ritt, Joseph Fels, 1893-1951)
nuc89-102629: His Integration in finite terms, 1948 (hdg. on NjR rept.: Ritt, Joseph Fels, 1893- ; usage: Joseph Fels Ritt)