[1] MIT, LINCOLN LAB, LEXINGTON, MA 02173 USA
[2] USA, WASHINGTON, DC 20310 USA
[3] UNIV SO CALIF, LOS ANGELES, CA 90089 USA
[4] UNIV ARIZONA, TUCSON, AZ 85721 USA
[5] USN, RES LAB, WASHINGTON, DC 20375 USA
[6] AT&T BELL LABS, MURRAY HILL, NJ 07974 USA
[7] UNIV ILLINOIS, CHAMPAIGN, IL 61820 USA
[8] CORNELL UNIV, ITHACA, NY 14853 USA
[9] DUPONT CO, WILMINGTON, DE 19898 USA
[10] UNIV MICHIGAN, ANN ARBOR, MI 48109 USA
[11] XEROX CORP, PALO ALTO, CA 94304 USA
[12] UNITED TECHNOL RES CTR, E HARTFORD, CT 06108 USA
[13] HEWLETT PACKARD LABS, PALO ALTO, CA 94304 USA
[14] HARRY DIAMOND LABS, WASHINGTON, DC 20438 USA
[15] HUGHES RES LABS, MALIBU, CA 90265 USA
[16] USAF, WASHINGTON, DC 20330 USA
[17] STANFORD UNIV, STANFORD, CA 94305 USA
[18] UNIV CALIF BERKELEY, BERKELEY, CA 94720 USA
[19] NATL SCI FDN, WASHINGTON, DC 20550 USA
[20] PURDUE UNIV, W LAFAYETTE, IN 47907 USA
[21] SUNY BUFFALO, BUFFALO, NY 14260 USA
[22] UNIV COLORADO, BOULDER, CO 80309 USA
[23] UNIV PENN, PHILADELPHIA, PA 19104 USA
[24] CALTECH, PASADENA, CA 91125 USA
[25] UNIV ROCHESTER, ROCHESTER, NY 14627 USA