Yazar
Harl Roy Douglass
20 cilt bulundu.
Fred Lea Stetson, Frederick Warren Cozens, Homer Price Rainey, Harl Roy Douglass, Carl Leo Huffaker, Donald G. Barnes, Howard Rice Taylor, Henry Davidson Sheldon, Burchard Woodson DeBusk, R. W. Leighton · Yayınevi bilinmiyor
472 sayfa · 1929
Education
E. H. McAlister, Earl Leroy Packard, Edmund S. Conklin, Edwin Thomas Hodge, H. R. Crosland, Harl Roy Douglass, Lloyd Leroy Smail, Roger John Williams, William Edmund Milne · Yayınevi bilinmiyor
912 sayfa · 1926
Algebra
Harl Roy Douglass, Charles Willis Boardman · Yayınevi bilinmiyor
588 sayfa · 1934
Education, Secondary
Charles Willis Boardman, Harl Roy Douglass, Rudyard K. Bent · Yayınevi bilinmiyor
378 sayfa · 1961
Educational leadership
Margaret Leckie Wheat, Harry Grove Wheat, Harl Roy Douglass, Geraldine Kauffman · Yayınevi bilinmiyor
360 sayfa · 1957
Arithmetic