00470nam a2200157Ia 4500 0000005649 20251012174614.0 720218s1963 maua b 000 0 eng HF3021 .V2 382 The natural resource content of United States foreign trade, 1870-1955. Cambridge, M.I.T. Press 1963 xvi, 142 p illus 24 cm. Bibliographical footnotes. United States Commerce. 7069 7069