00972nam a2200253Ia 4500001000700000003000600007005001700013008004100030020001500071040002500086049001300111090002100124092002100145100003500166245007100201250001100272260008900283300003200372490004500404650004000449650002800489999001900517952018200536265313OCoLC20160527193308.0000608s1998    mx ac        f000 0 spa d  a9681657721  aUBPbspacUBPdOCLCQ  aPUXAbab  aQB851b.H32 19980 a523.8875bH124h21 aHacyan, Shahen.2Local910727314aLos hoyos negros y la curvatura del espacio-tiempocShahen Hacyan.  a2. ed.  aMéxicobSecretaría de Educación PúblicabFondo de Cultura Económicac1998.  a128 p.bill., fots.c21 cm. 3aLa ciencia para todosv502Local9121993 0aBlack holes Astronomy2Local962740 0aCosmology2Local981221  c191265d191265  00102ddc406523_887500000000000_H124H2708abl9203098a1b1c17d2016-05-27eLib. Borikeng12.00i376523l0o523.8875 H124h2p60000003000194r2016-05-27 00:00:00xr:265313y6