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Acta Palaeobotanica -- ISSN 0001-6594
Acta Palaeontologica Polonica -- ISSN 0567-7920
Acta Palaeontologica Romaniae
Acta Palaeontologica Sinica -- ISSN 0001-6616
Acta Paleobotanica -- ISSN 0001-6594
Acta Physica Polonica A -- ISSN 0587-4246, 1898-794X
Acta polytechnica
Acta Protozoologica -- ISSN 0065-1583
Acta Pruhoniciana -- ISSN 0374-5651
Acta Rerum Naruralium. (Přírodovědný sborník Vysočiny.) -- ISSN 1801-5972
Acta rerum naturalium -- ISSN 1801-5972
Acta Rerum Naturalium Musei Nationalis Slovaci, Bratislava -- ISSN 0139-5424
Acta rerum naturalium (Přírodovědný sborník Vysočiny) -- ISSN 1801-5972, 1803-1587
Acta Research Reports -- ISSN 1214-9691
Acta Societatis Zoologicae Bohemicae -- ISSN 1211-376X
Acta Technica Corviniensis - Bulletin of Engineering. online supplement of the Annals of Faculty Engineering Hunedoara - International Journal of Engineering
Acta Univ. Comen., Form. Protect. Natur.
Acta Universitatic Carolinae - Geologica -- ISSN 0001-7132
Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis -- ISSN 1211-8516
Acta Universitatis Agriculturae. Facultas agronomica