Library has: August 1970--December 1970, February 1971--April 1971, August 1971--April 1972, September 1972--October 1972, December 1972--January 1973, March 1973, December 1973--April 1974, October 1974--April 1975, August 1975, October 1975--April 1976, September 1976--November 1976.