Yazar
j herath
8 cilt bulundu.
J. W. Herath · Geological Survey Dept., Ministry of Industries and Scientific Affairs, Republic of Sri Lanka (Ceylon)
113 sayfa · 1973
Clay
J. W. Herath · Geological Survey Dept., Ministry of Industries and Scientific Affairs, Republic of Sri Lanka (Ceylon)
72 sayfa · 1975
Mines and mineral resources
J. W. Herath · ministry of industries and scientific affairs republic in srilanka
Sayfa sayısı yok · 1975
Kategori yok
M. M. J. W. Herath · Commonwealth Geological Liaison Office
Sayfa sayısı yok · 1977
Gondwana (Geology) / Congresses
M. M. J. W. Herath · Commonwealth Geological Liaison Office
43 sayfa · 1977
Sri Lanka / Mineral industries
J. W. Herath · Ministry of Industrial Development, Sri Lanka
167 sayfa · 1998
Ceramic industries / Ceramic materials
M. M. J. W. Herath · Commonwealth Geological Liaison Office
11 sayfa · 1977
Landsat satellites / Remote sensing