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by Samuel Ralph Powers
AMS Press 1972 Contributions to education no. 149
Available at 14 libraries
by Frank Covert Jean, Ezra Clarence Harrah and Fred Louis Herman ; with the editorial collaboration of Samuel Ralph Powers
Ginn c1949 Rev. ed
Available at 3 libraries
by Anita Duncan Laton and Samuel Ralph Powers
McGraw-Hill c1949
Available at 20 libraries
Ginn c1946 New ed Adventuring in science / by Samuel Ralph Powers ... [et al.]
Available at 13 libraries
Available at 12 libraries
Available at 10 libraries
Ginn and Company c1944
by Frank Covert Jean , Ezra Clarence Harrah and Fred Louis Herman ; with editorial cokkaboration of Smuel Ralph Powers
Ginn c1943
Available at 1 libraries
Ginn 1941 Adventuring in science / by Samuel Ralph Powers ... [et al.]
Available at 2 libraries
Ginn c1940 Adventuring in science / by Samuel Ralph Powers ... [et al.]
Available at 4 libraries
Ginn 1940 Adventuring in science / by Samuel Ralph Powers ... [et al.]
Ginn and Company c1934
Teachers College, Columbia University 1924 Contributions to education no. 149
University of Minnesota 1920 Research publications of the University of Minnesota . Current problems ; no. 13
by Samuel Ralph Powers ... [et al.]
Ginn