Author
Hughes, R. O. (Ray Osgood), 1879-1959
13
Wilder, Howard Baker, 1901-
13
Biological Sciences Curriculum Study
12
Gavian, Ruth Wood, 1903-
10
Jaffe, Bernard, 1896-
10
Kroeber, Elsbeth, 1882-
10
Muzzey, David Saville, 1870-1965
9
Schultz, Mindella
9
Ames, Maurice U. (Maurice Umschweif)
8
Anderson, Howard R., 1898-
8
Hartman, Gertrude, 1876-1955
8
Wolff, Walter H.
8
Allen, Jack, 1914-2004
7
Berg, Harry D.
7
Pittsburgh Public Schools
7
Bleifeld, Maurice
6
Bragdon, Henry W. (Henry Wilkinson), 1906-1980
6
Developmental Economic Education Program (U.S.)
6
Globe Book Company
6
Graff, Henry F. (Henry Franklin), 1921-
6
Hamm, William Albert, 1892-
6
Hartley, William Harrison
6
Laidlaw Brothers
6
Magruder, Frank Abbott, 1882-1949
6
McClenaghan, William A.
6
McCrocklin, James H.
6
McCutchen, Samuel Proctor, 1901-1966
6
Pullen, C. H. W. (Charles Haines W.)
6
Todd, Lewis Paul, 1906-
6
Augspurger, Everett
5
Biller, Edward L.
5
Glim, Theodore E. (Theodore Edgar), 1917-
5
Houghton Mifflin Company
5
Lloyd, Minnie
5
Magenis, Alice
5
Manchester, Frank S.
5
O'Connor, John Richard, 1920-
5
Petty, W. M. (Willette Mildred), 1923-
5
Starr, Isidore
5
Steinberg, Samuel, 1899-
5
Wallbank, T. Walter (Thomas Walter), 1901-
5
Young, L. E. (Leona Esther), 1895-
5
Alexander, Peter, 1943-
4
Appel, John Conrad
4
Buske, Morris R., 1912-2005
4
Dimond, Stanley E. (Stanley Ellwood), 1905-
4
Driscoll, Paul
4
Drummond, Muriel Jean
4
Dull, Charles E. (Charles Elwood), 1878-1947
4
Frizzle, Donald B.
4
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