@book{batchelder:1967:lde,
    author = {Batchelder, Paul M.},
     title = {An Introduction to Linear Difference Equations},
 publisher = {Dover Publications Inc.},
   address = {New York},
      year = {1967},
      note = {Unaltered republication of the original 1927 Harvard University
              edition.},
     pages = {viii+209},
   mrclass = {39.20 (33.00)},
  mrnumber = {MR0216187 (35 \#7022)},
     zblno = {53.0430.09}}