Book Wolter, John A.; Grim, Ronald E. (1997)
Images of the world: The atlas through history. (/isis/citation/CBB000080191/) unapi

Book Storey, William K. (1996)
Scientific aspects of European expansion. (/isis/citation/CBB000070201/) unapi

Book Historian's guide to early British maps: A guide to the location of pre-1900 maps of the British Isles preserved in the United Kingdom and Ireland (1994). (/isis/citation/CBB000057975/) unapi

Book Mundialización de la ciencia y cultura nacional: Actas del Congreso Internacional “Ciencia, Descubrimiento y Mundo Colonial” (1993). (/isis/citation/CBB000033515/) unapi

Article Wallis, Helen (1992)
Cartographic knowledge of the world in 1492. Mariner's Mirror (pp. 407-418). (/isis/citation/CBB000045971/) unapi

Book Croiset van Uchelen, Ton; Horst, Koert van der; Schilder, Günter (1989)
Theatrum orbis librorum: Liber amicorum presented to Nico Israel on the occasion of his seventieth birthday. (/isis/citation/CBB000035496/) unapi

Book Wallis, Helen M.; Robinson, Arthur H. (1987)
Cartographical innovations: An international handbook of mapping terms to 1900. (/isis/citation/CBB000052994/) unapi

Article Wallis, Helen (1985)
Emigré map-makers of the late 16th century and the Protestant New World. Proceedings of the Huguenot Society of London (pp. 210-220). (/isis/citation/CBB000060816/) unapi

Book Thrower, Norman J. W. (1984)
Sir Francis Drake and the famous voyage, 1577-1580: Essays commemorating the quadricentennial of Drake's circumnavigation of the Earth. (/isis/citation/CBB000011835/) unapi

Article Wallis, Helen (1980)
The royal map collections of England. Revista da Universidade de Coimbra (pp. 461-468). (/isis/citation/CBB000001065/) unapi

Article Ernst Bernleithner (1903-1978) (1979). Imago Mundi: A Review of Early Cartography (pp. 96-97). (/isis/citation/CBB000011479/) unapi

Article Captain James Cook (1728-1779) (1978). Pacific Studies (pp. 71-217). (/isis/citation/CBB000008842/) unapi