430 U.S. 551 97 S.Ct. 1386 51 L.Ed.2d 631 NATIONAL GEOGRAPHIC SOCIETY, Appellant,v.CALIFORNIA BOARD OF EQUALIZATION. No. 75-1868. Argued Feb. 23, 1977. Argued April 4, 1977. Decided April 4, 1977. Syllabus Appellant Society, a nonprofit corporation with headquarters in the District of Columbia, which maintains two offices in California that solicit advertising for the Society’s […]