RT Journal Article SR Electronic T1 Tax-Exempt Foundations: Their Effects on National Policy JF Science JO Science FD American Association for the Advancement of Science SP 220 OP 228 DO 10.1126/science.168.3928.220 VO 168 IS 3928 A1 Horowitz, Irving Louis A1 Horowitz, Ruth Leonora YR 1970 UL http://science.sciencemag.org/content/168/3928/220.abstract AB