Talvez deva tentar algumas variações de ortografia:
computer based » computer aided (Expandir a Pesquisa)
were compared » care compared (Expandir a Pesquisa), eye compared (Expandir a Pesquisa), gene compared (Expandir a Pesquisa)
compared can » compared a (Expandir a Pesquisa), compared law (Expandir a Pesquisa), companies can (Expandir a Pesquisa)
dal computer » dental computer (Expandir a Pesquisa), small computer (Expandir a Pesquisa), local computer (Expandir a Pesquisa)
narr clamp » arm clamp (Expandir a Pesquisa)
clamp pcr » lamp pcr (Expandir a Pesquisa), clamp pcna (Expandir a Pesquisa), amp pcr (Expandir a Pesquisa)
based now » based snow (Expandir a Pesquisa), based non (Expandir a Pesquisa), based no2 (Expandir a Pesquisa)
pcr netw » pcr new (Expandir a Pesquisa), pcr next (Expandir a Pesquisa)
j were » j wert (Expandir a Pesquisa), j werz (Expandir a Pesquisa), j werner (Expandir a Pesquisa)
j narr » l narr (Expandir a Pesquisa), j nair (Expandir a Pesquisa), j nare (Expandir a Pesquisa)
j dal » j dale (Expandir a Pesquisa), j daly (Expandir a Pesquisa), j dahl (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: (((( j were compared can new ) OR ( j narr clamp pcr netw ))) OR ( j dal computer based now ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( j were compared can new ) or ( j narr clamp pcr netw ))) or ( j dal computer based now ))*.