"ferguson, g w. "
astronomical navigation: / g.w. ferguson - 1 ed. - uk : sir isaac pitman 1943. - "viii, 70p.; 22 cm."
hard cover
527. fer
astronomical navigation: / g.w. ferguson - 1 ed. - uk : sir isaac pitman 1943. - "viii, 70p.; 22 cm."
hard cover
527. fer