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Natural History 1980's

1980 January, February, March, April, May, June, July, August, September, October, November, December	1981 January, February, March, April, May, June, July, August, September, October, November, December	1982 January, February, March, April, May, June, July, August, September, October, November, December
1983 January, February, March, April, May, June, July, August, September, October, November, December	1984 January, February, March, April, May, June, July, August, September, October, November, December	1985 January, February, March, April, May, June, July, August, September, October, November, December
1986 January, February, March, April, May, June, July, August, September, October, November, December	1987 January, February, March, April, May, June, July, August, September, October, November, December	1988 January, February, March, April, May, June, July, August, September, October, November, December
1989 January, February, March, April, May, June, July, August, September, October, November, December