Hellins, J. d. 1. (1792). An extract from a letter of the Rev. Mr. John Hellins: Formerly assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792. s.n.
Chicago-Zitierstil (17. Ausg.)Hellins, John d. 1827. An Extract from a Letter of the Rev. Mr. John Hellins: Formerly Assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, Near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792. [London]: s.n, 1792.
MLA-Zitierstil (9. Ausg.)Hellins, John d. 1827. An Extract from a Letter of the Rev. Mr. John Hellins: Formerly Assistant to Mr. (now Dr.) Maskelyne, the Astronomer-Royal at Greenwich Observatory, to Francis Maseres, Esq. Dated Potter's Pury, Near Stoney Stratford, in Buckinghamshire, Sept. 25, 1792. s.n, 1792.