00842nam0-22003011i-450 99000085447040332120201119104201.0000085447FED01000085447(Aleph)000085447FED0100008544720001010d1969----km-y0itay50------baengUSy-------001yyGravitationan elementary explanation of the principal perturbation in the solar systemG. B. AiryAnn Arbor- MichiganNeo Press1969173 p.18 cm531Airy,George Biddell<1801-1892>42171ITUNINARICAUNIMARCBK99000085447040332102 9 E 92391FINBNFINBNGravitation349539UNINAING01