Only one earth : the care and maintenance of a small planet

The planet venus

Keterkaitan pendekatan system of cities dan fenomena kota besar- kota kecil di Provinsi Sulawesi Selatan = Linkage between system of cities and big sities-small towns phenomenon in Sulawesi Selatan Province

Small town and rural human resources development to reduce migration to large cities: China, India, Indonesia, Nepal, Papua New Guinea / United Nations

Distribution of the element in our planet