searching for sisters

Hello everybody, My name is Martijn Koops. I'm 30 years old and living in the Netherlands. I was adopted from Korea when i was 1.5 years old. My Korean name is Cho, Byung Il. I went back to Korea in 2001 and met my birthmother. Until a week before my flight i always asumed to be an orphan. In Korea i heard i've got two older sisters who were adopted to a US couple stationed(must be round 1979) at Guam. This is the only information i got besides a few pictures. So now i am trying to find my sisters. Unfortunatly i lost their birthdate. The oldest must be about 32/33 now. Her korean name is Cho, Mi Ae. The youngest must be about 31/32. Her korean name is Cho, Mi Yun.

If anybody knows them or heard about a family stationed at Guam base at about 1978/1979 please let me know. Also all tips on how i should go on with my search are very welcome. You can contact me by mail at byung78@gmail.com or add my on msn byung_il@hotmail.com Yours sincerely Martijn Koops Mi Ae Mi Yun Adoptive parents