PT - JOURNAL ARTICLE AU - Ram, J. Sri TI - Letter to the Editor AID - 10.1126/science.147.3659.677-b DP - 1965 Feb 12 TA - Science PG - 677--677 VI - 147 IP - 3659 4099 - http://science.sciencemag.org/content/147/3659/677.3.short 4100 - http://science.sciencemag.org/content/147/3659/677.3.full SO - Science1965 Feb 12; 147