@book{pagurova:1961:tei,
    author = {Pagurova, V. I.},
     title = {Tables of the Exponential Integral ${E}_{\nu }(x)
              =\int_{1}^{\infty}e^{-xu}u^{-\nu }du$},
 publisher = {Pergamon Press},
   address = {New York},
      year = {1961},
     pages = {xviii+151},
   mrclass = {65.05},
  mrnumber = {MR0129152 (23 \#B2189)},
mrreviewer = {J. C. P. Miller},
     zblno = {0108.14002}}