Advertising Over the Years

Ads in Sky and Telescope
July 1975 September 1975 March until November, 1976 Spring 1977 Summer 1977
Winter 1977 April until September, 1978 December 1978 until July 1979 October 1979 until September 1982 December 1981
September 1983 Summer 1984 June 1985 until June 1986 August 1986 until April 1987 June 1987 until April 1988
June 1988 until April, 1989 May, November, 1989 March, 1990 July, September,1989 January, May, June, 1990 August 1990 until December 1991
February 1992 until May 1995 May 1992 until March 1993 April 1996 June 1996 until September 2000 April 1998 until June 1999
 
July 1999 August 1999 until January 2000

Spring 2000

October 2000 until Present  


Ads in Astronomy Magazine
July 1985 until May 1986 July 1986 September 1986 until May 1987 April 1987 Summer 1987
August, October, December, 1989 February, July, 1990 April 1990 September 1990 October 1990 until August, 1992
May 1992 June 1993 until August 1994 April 1998 until June 1999 July 1999 August 1999 until May, 2000
     
April 1996 until September 2000 October 2000 to present      


Ads in The Photonics Buyers' Guide
1988-1990

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