Metonic Cycle http://scienceworld.wolfram.com/astronomy/MetonicCycle.html "Meton Döngüsü (İngilizce)" Meton Döngüsü Hesaplanması (İngilizce) Metonic http://scienceworld.wolfram.com/astronomy/MetonicCycle.html Metonic cycle Metonic Cycle 19-year lunar cycle http://scienceworld.wolfram.com/astronomy/MetonicCycle.html Metonic