00561nam a2200169Ia 4500003000900000008004100009040001600050080001600066245012800082260006800210300001500278650002200293650002000315650001800335700001700353700002100370IN-BaIIA211028s9999    xx            000 0 eng d  cIIA Library  a523.64bTHE 4aThe comet Halley archive summary volumecedited by Z. Sekanina and L. Fry                                                    aWashingtonbNational Aeronautics and Space Administrationc1991  avii, 332p.  aAstronomy network  aNucleus studies  aRadio science  aFry, L., ed.  aZ. Sekanina, ed.