Peran customs narcotics team dalam melakukan deteksi dini guna mencegah penyelundupan narkotika dan psikotropika di pelabuhan Tanjung Priok = The role of customs narcotics team in doing early detection to prevent the smuggling of narcotics and psychotropic substance in the port of Tanjung Priok / Ilham Wellem - Ilham Wellem, author (2013)