Yazar
a r drysdall
14 cilt bulundu.
A. R. Drysdall · Ministry of Mines and Co-operatives, Geological Survey Dept.
82 sayfa · 1966
Pottery industry
A. R. Drysdall · Geological Society of South Africa
69 sayfa · 1966
Sedimentary rocks / Sedimentation and deposition / Rifts (Geology) / Stratigraphic Geology / Coal
A. R. Drysdall · Rhodesian Study Circle in co-operation with Christie's Robson Lowe
171 sayfa · 1990
History / Postage stamps / Postal service
Colin R. Ramsay, D. B. Stoeser, A. R. Drysdall, Alan R. Drysdall · Pergamon
292 sayfa · 1986
Petrology / Igneous Rocks / Mineralogy / Rocks & Minerals / Igneous Petrology
A. R. Drysdall, Colin R. Ramsay, D. B. Stoeser · Deputy Ministry for Mineral Resources
291 sayfa · 1985
Igneous rocks / Mineralogy / Intrusions (Geology) / Ore deposits