Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
nat'l computer » nature computer (Expandir a Pesquisa), novel computer (Expandir a Pesquisa), dal computer (Expandir a Pesquisa)
clamp may » clamp made (Expandir a Pesquisa), clamp a (Expandir a Pesquisa), clamp m (Expandir a Pesquisa)
may newly » a newly (Expandir a Pesquisa), men newly (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
nat comp » et comp (Expandir a Pesquisa)
comp can » camp can (Expandir a Pesquisa), chimp can (Expandir a Pesquisa), clamp can (Expandir a Pesquisa)
c clamp » _ clamp (Expandir a Pesquisa)
_ nat'l » _ natal (Expandir a Pesquisa), _ natl (Expandir a Pesquisa), _ nato's (Expandir a Pesquisa)
e nat » e nata (Expandir a Pesquisa), e nao (Expandir a Pesquisa), e nas (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( e nat comp can new ) OR ( j c clamp may newly ))) OR ( _ nat'l computer based now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( e nat comp can new ) or ( j c clamp may newly ))) or ( _ nat'l computer based now ))*.