LEADER 00803nam0-22002891i-450- 001 990001027040403321 010 $a0-12-454750-8 035 $a000102704 035 $aFED01000102704 035 $a(Aleph)000102704FED01 035 $a000102704 100 $a20000920d1977----km-y0itay50------ba 101 0 $aeng 200 1 $aInvariant variational principles$fDavid John Logan 210 $aNew York$cAcademic Press$d1977 225 1 $aMathematics in science and engineering$v138 610 0 $aMeccanica classica 676 $a531 700 1$aLogan,$bJohn David$048876 801 0$aIT$bUNINA$gRICA$2UNIMARC 901 $aBK 912 $a990001027040403321 952 $a24-087$b10844$fFI1 959 $aFI1 996 $aInvariant variational principles$9339402 997 $aUNINA DB $aING01