YEL - Yayasan Ekosistem Lestari

Jl. Wahid Hasyim No. 51/74 Medan 20154
Sumatera Utara - Indonesia
Telp. 62-61-4514363, 62-61-4514360
Fax. 62-61-4514749
P.O Box 1472 Medan - 20001
Email: yel_mdn(at)telkom.net, yel(at)yelweb.org