@article{53158,
      author = {Schwartz, Jacob T. and Naoum, Adil, and Roitberg, Joseph,},
      url = {http://library.usi.edu/record/53158},
      title = {Differential geometry and topology},
      publisher = {Gordon and Breach},
      recid = {53158},
      pages = {ix, 170 p.},
      address = {New York,},
      year = {1968},
}