LEADER 01070nam a2200277 i 4500
001 991000879969707536
005 20020507175122.0
008 930605s1989    us            ||| | eng  
020   $a0821851039
035   $ab10770197-39ule_inst
035   $aLE01303736$9ExL
040   $aDip.to Matematica$beng
084   $aAMS 05C15
100 1 $aAppel, Kenneth I.$0222857
245 10$aEvery planar map is four colorable /$cKenneth Appel, Wolfgang Haken
260   $aProvidence, R. I. :$bAmerican Mathematical Society,$c1989
300   $axv, 741 p. ;$c25 cm
490 0 $aContemporary mathematics,$x0271-4132 ;$v98
650  0$aFour-color problem
700 1 $aHaken, Wolfgang$eauthor$4http://id.loc.gov/vocabulary/relators/aut$054072
907   $a.b10770197$b23-02-17$c28-06-02
912   $a991000879969707536
945   $aLE013 05C APP11 (1989)$g1$i2013000128818$lle013$o-$pE0.00$q-$rl$s-  $t0$u0$v0$w0$x0$y.i10868586$z28-06-02
996   $aEvery planar map is four colorable$91455559
997   $aUNISALENTO
998   $ale013$b01-01-93$cm$da  $e-$feng$gus $h0$i1