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21 April 1989 Cover 21 April 1989     Volume 244     Issue 4902
  EDITORIAL
Progress in Energy R & D
    Philip H. Abelson
    Science Apr 21 1989: 273. PDF

  ARTICLES
Photovoltaics Today and Tomorrow
    H. M. Hubbard
    Science Apr 21 1989: 297. PDF

Changing Prospects for Natural Gas in the United States
    W. M. Burnett and S. D. Ban
    Science Apr 21 1989: 305. PDF

Improving the Efficiency of Electricity Use in Manufacturing
    Marc Ross
    Science Apr 21 1989: 311. PDF

Improved and Safer Nuclear Power
    John J. Taylor
    Science Apr 21 1989: 318. PDF

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Science. ISSN 0036-8075 (print), 1095-9203 (online)