Materials for high efficiency monolithic multigap concentrator solar cells : SERI quarterly report no. 4, January 1 - March 31, 1980.

"Work Performed Under Contract No. AC02-77CH00178."

Development of high efficiency (14%) solar cell array module : second quarterly report for period covering 15 March 1979 to 15 July 1979 /

"JPL Contract No. 955217."

Development of high efficiency GaAs polycrystal solar cells.

"Work Performed Under Contract No. ET-78-C-03-1712."

Development of high efficiency solar cells : final technical report for January 23, 1978-January 2, 1979 /

"April 1979."

Photovoltaic research branch semiannual report : period covered : 1 October 1979 to 31 March 1980 /

This report covers SERI research activities on solid-state theory, high-efficiency cells, thin-film cells, silicon purification, silicon crystallization, thick-film technology, surface and interface analysis, and growth of GaAs and related compounds by metal-organic chemical vapor desposition.

Efficiency in high schools : studies, 1911-14, in the application of the principles of scientific management to high school problems made by the High School Teachers' Association of New York City /

At head of title: H.S.T.A. Bulletins 29-46.

National longitudinal study of the high school class of 1972 : sample design efficiency study : optimal two-stage sample design /

"Prepared by Research Triangle Institute under contract no. OEC-0-73-6666 with U.S. Dept. of Health, Education, and Welfare."

National longitudinal study of the high school class of 1972 : sample design efficiency study: effects of stratification, clustering, and unequal weighting on the variances of NLS statistics /

Project officer: William B. Fetters.