Korea South 715a-717a sheets, MNH, $5.00. Michel Bl.307-309, Euros 15.00. Korean ancient fine art, 1970. Jongyangsa Temple and Mt Kumgang, by Chong Son, 1676-1759; Mountains and Rivers, by Yi In-moon, 1745-1821; Mountains and Rivers in Moonnight, by Kim Dooryang, 1696-1763.