00555nam a2200169Ia 4500003000900000008004100009020001800050040001600068080001500084100001800099245013000117260003000247300001000277650004100287650003100328650002600359IN-BaIIA211028s9999    xx            000 0 eng d  a0-444-41371-5  cIIA Library  a523.6bOPI  aOpik, Ernst J 0aInterplanetary encountersbclose-range gravitational interactionscErnst J Opik                                                aAmsterdambElsevierc1976  a155p.  aAstronomy and astrophysics thesaurus  aGravitational interactions  aInterplanetary matter