% You can get entries for bibliography files from MathSciNet.

@article {MR29:621,
    AUTHOR = {Hudson, J. F. P. and Zeeman, E. C.},
     TITLE = {On combinatorial isotopy},
   JOURNAL = {Inst. Hautes \'Etudes Sci. Publ. Math.},
    NUMBER = {19},
      YEAR = {1964},
     PAGES = {69--94},
   MRCLASS = {55.60},
  MRNUMBER = {29 \#621},
MRREVIEWER = {N. H. Kuiper},
}

@book {MR29:634,
    AUTHOR = {Milnor, J.},
     TITLE = {Morse theory},
    SERIES = {Based on lecture notes by M. Spivak and R. Wells. Annals of
              Mathematics Studies, No. 51},
 PUBLISHER = {Princeton University Press},
   ADDRESS = {Princeton, N.J.},
      YEAR = {1963},
     PAGES = {vi+153},
   MRCLASS = {57.50 (53.72)},
  MRNUMBER = {29 \#634},
MRREVIEWER = {H. I. Levine},
}
@book {MR16:957b,
    AUTHOR = {de Rham, Georges},
     TITLE = {Vari\'et\'es diff\'erentiables. {F}ormes, courants, formes
              harmoniques},
    SERIES = {Actualit\'es Sci. Ind., no. 1222 = Publ. Inst. Math. Univ.
              Nancago III},
 PUBLISHER = {Hermann et Cie, Paris},
      YEAR = {1955},
     PAGES = {vii+196},
   MRCLASS = {53.0X},
  MRNUMBER = {16,957b},
MRREVIEWER = {P. A. Smith},
}