Provisorische karte von Frank Gregory's Reisen in Nordwest-Australien, April bis Juni 1858 & Mai bis Oktober 1861 [cartographic material] /

Map of northwest Australia showing Frank Gregory's route from April to June 1858 and May to October 1861. Relief shown by hachures and spot heights.; In upper left margin: Petermann's Geographische Mittheilungen.; In upper right margin: Jahrgang 1862, Tafel 11.; In lower left margin: B. Hassenstein.; In lower right margin: Lith. Anst. von C. Hellfarth in Gotha.; Pl. 11 from: Petermanns geographische Mittheilungen. Gotha : J. Perthes, 1862.; Prime meridian: Greenwich.; National union catalog of pre-1956 imprints, v. 452, p. 500.; Also available in an electronic version via the Internet at: http://nla.gov.au/nla.map-rm3749