Analysis of information sources in references of the Wikipedia article "Schleicher ASH 25" in English language version.
..was manufactured by Schleicher in a number of versions for almost 20 years, productions was stopped in 2004 with serial number 266
...the single seated ASW-22 from which the ASH-25 was derived.
...the single seated ASW-22 from which the ASH-25 was derived.