Encyclopedia of exploration, 1850 to 1940 :

the oceans, islands and polar regions /

Encyclopedia of exploration to 1800 /

Encyclopedia of exploration, 1800 to 1850 :

a comprehensive reference guide to the history and literature of exploration, travel and colonization between the years 1800 and 1850 /

Encyclopedia of exploration, 1850 to 1940 :

continental exploration /

Encyclopedia of exploration :

invented and apocryphal narratives of travel : a comprehensive guide to invented, imaginary, apocryphal and plagiarized narratives of travel by land, sea and air, from the earliest times to the twentieth century /