المؤلفون: Hoopes,, Edgar M., Caird, James M.

المصدر: Journal (American Water Works Association), 1914 Mar 01. 1(1), 111-134.

URL الوصول: https://www.jstor.org/stable/41224158

المؤلفون: Hollinger, John A., Amon, J. Clyde, Hoopes, Edgar M., Manwiller, Charles E.

المصدر: Science Education; Apr/May1944, Vol. 28 Issue 3, p130-135, 6p

مصطلحات موضوعية: SCIENCE education, PHYSICAL sciences education, SECONDARY education, ELEVENTH grade (Education), TWELFTH grade (Education), SCIENTIFIC experimentation, ENERGY transfer, MOTION picture projectors, TEACHING aids

مصطلحات جغرافية: UNITED States

المؤلفون: Hoopes, Edgar M., 1856-1916

مصطلحات الفهرس: Delaware, Editorials, U.S. states--Politics and government, Letter

URL: http://theodorerooseveltcenter.org/Research/Digital-Library/Record?libID=o303032