Selaus tekijän mukaan kokoelmassa Maantiede ja matkailu
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Specimen historicum, de Alandia, Maris Baltici insula, cujus partem priorem, consensu ampliss. facultatis philosoph. in Reg. Acad. Upsal. praeside ... mag. Elia Frondin, ... Publico examini submittit alumnus regius, Christophorus Tärnström, Uplandus, ... In auditor. Gustav. maj. ad diem I. Dec. MDCCXXXIX. Horis ante meridiem solitis
Frondin, Elias; Tärnström, Christopher (Upsaliae impressum : [s.n.], 1739, 1739)A description of Åland, Finland.Available on the Internet