@article{geller:1969:tei,
    author = {Geller, Murray and Ng, Edward W.},
     title = {A table of integrals of the exponential integral},
   journal = {J. Res. Nat. Bur. Standards Sect. B},
    volume = {73B},
      year = {1969},
     pages = {191–210},
   mrclass = {33.10 (65.00)},
  mrnumber = {MR0249669 (40 \#2910)},
mrreviewer = {John Todd},
     zblno = {0183.44003}}