共 5 条
[1]
Middle Class Economics:Investing in American Innovation. http://www.whitehouse.gov.htm . 2015
[2]
Research and Development Chapter 19 in Analytical Perspectives :the Budget of the U.S.Government FY 2016. http://www.whitehouse.gov.htm . 2015
[3]
President’’s 2016 Budget Invests in America’’s Future:R&D,Innovation,and STEM education. http://www.whitehouse.gov.htm . 2015