00974agm a2200301u  450000100160000000500170001600700240003300800410005701000160009803500230011403500110013703500200014804000480016804900090021605000120022509000170023709900150025424500730026926000390034230000620038150000270044350000350047052000820050565000230058771000390061096600100064999900130065999636747010231120260227104059.0mr-caaad               800828s1979    xxu023 e         0mlengmc  a80700159 /F  a(TU)000636747UTK019 a669517  a(OCoLC)06890495  aNational Geographic SocietycDLCdm.c.dTKN  aTKNk  aQE511.5  aQE511.5b.O8  aQE511.5.O800aOur dynamic Earth.h[motion picture] /cNational Geographic Society.  aWashington :bThe Society,cc1979.  a1 reel, 23 min. :bsd.,col. ;c16 mm.e& teacher's guide.  aTitle from data sheet.  aAlso issued as videorecording.  aExamines information about continental drift gathered from deep sea research. 0aContinental drift.2 aNational Geographic Society (U.S.)  aprimo  c193d193