Dissertatio physico-astronomica de errore in parallaxi corporum coelestium, a refractione lucis in athmosphæra ipsorum, oriundo. Quam, cons. ampl. facult. philos. Aboëns. publico examini subjiciunt Johannes Fridericus Ahlstedt, mathes. puræ docens, & respondens Johannes Elgfors Satacundensis. In audit. mathem. die XIV Dec. MDCCCV. h. p. m. s

Förlag	År	Ort	Om boken	ISBN
	1805	Finland, Aboæ, typis Frenckellianis	[2], 10 [2] sidor., [1] vikt pl.-bl. 4:o