. . "Popular Astronomy : a Concise Elementary Treatise on the Sun, Planets, Satellites and Comets" . . . . . "Electronic books"@en . . . . . "Popular astronomy : a concise elementary treatise on the Sun, planets, satellites and comets"@en . . . . "Popular astronomy a concise elementary treatise on the sun, planets, satellites, and comets"@en . . . . . . "Popular astronomy a concise elementary treatise on the sun, planets, satellites and comets" . "Popular astronomy a concise elementary treatise on the sun, planets, satellites and comets"@en . . . . . "Popular astronomy. A concise elementary treatise on the sun, planets, satellites and comets" . "Popular astronomy. A concise elementary treatise on the sun, planets, satellites and comets"@en . . . . "Popular astronomy A concise elementary treatise on the sun, planets, satellites and comets"@en . . . . . . . "Popular astronomy : a concise elementary treatise on the sun, planets, satellites, & comets"@en . . . . "Popular astronomy : a concise elementary treatise on the sun, planets, satellites and comets"@en . . "Popular Astronomy : a concise elementary treatise on the sun, planets, satellites, and comets"@en . "Popular astronomy : a concise elementary treatise on the sun, planets, satellites and comets" . . . "Popular astronomy : a concise elementary treatise on the sun, planets, satellites, and comets"@en . . . . . "Popular Astronomy"@en . . . . . . . . "Popular astronomy : a concise elementary treatise on the sun, planets, satellites & comets"@en . "Popular astronomy : a concise elementary treatise on the sun, planets, satellites & comets" . . "Society for Popular Astronomy." . . "Astronomy Periodicals." . . "Western College, Brighton," . .