$a OLSZT 003/bak $c OLSZT 003/bak $d WA 72/01OVF $d WA U/JL $d KR PAU/ICH $d WA U/MNi
046
$f 1963
100
1
$a Ahlberg, Per Erik $d (1963- ).
400
1
$a Ahlberg, Per E.
400
1
$a Ahlberg, Per $d (1963- ).
667
$a Historia naturalna.
670
$a Major events in early vertebrate evolution / ed. by Per Erik Ahlberg. - New York, 2001. $b Red.
670
$a LCA online
670
$a Fossils, function and phylogeny / ed. Marcello Ruta, Per E. Ahlberg. - Edinburgh, 2019.
670
$a Exotic trilobites from the uppermost Cambrian Series 3 and lower Furongian of Sweden / Anna Żylińska, Thomas Weidner, John Ahlgren, Per Ahlberg // Acta Geologica Polonica. - Vol. 65, No 1 (2015). - strony 21-67.