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Volume 18, No 1; January 1981, whole number 181
Volume 18, No 2; April 1981, whole number 182
Volume 18, No 3; June 1981, whole number 183
Volume 18, No 4; August 1981, whole number 184
Volume 18, No 5; October 1981, whole number 185
Volume 18, No 6; January 1982, whole number 186
Volume 18, No 7; April 1982, whole number 187
Volume 18, No 8; June 1982, whole number 188
Volume 18, No 9; August 1982, whole number 189
Volume 18, No 10; October 1982, whole number 190
Volume 18, No 11; January 1983, whole number 191
Volume 18, No 12; April 1983, whole number 192
Volume 18 complete.
