01021cam a22002771  4500001001300000003000400013005001700017008004100034010001700075035001900092040004700111042001200158050001600170082000800186100002400194245019300218260006400411300005600475504004000531650001500571650002000586650002500606740005800631740003700689999001700726gs 37000222 DLC20260227111342.0770622s1937    xx ab         000 0 eng c  ags 37000222   a(OCoLC)3060069  aU.S. Geol. survey. LibrarycUUdOCoLCdDLC  apremarc00aQE621b.T75  a5411 aTromp. Solco Walle.10aOn the mechanism of the geological undulation phenomena in general and of folding in particular and their application to the problem of the "Roots of mountains" theory,cby Dr. S.W. Tromp.  aLeiden.bA.W. Sijthoff's uitgeversmaatschappij N.V.,c1937.  a3p. l., 184 p.bincl. illus., maps. diagrs.c25 cm.  a"List of publications": p. 172-184. 0aMountains. 0aFolds (Geology) 0aGeology, Structural.4 aThe Mechanism of the geological undulation phenomena.5 aThe "Roots of mountains" theory.  c27372d27372