Talvez deva tentar algumas variações de ortografia:
based companies » based composites (Expandir a Pesquisa), listed companies (Expandir a Pesquisa), based comparison (Expandir a Pesquisa)
companies can » companies case (Expandir a Pesquisa), companies a (Expandir a Pesquisa), companies cut (Expandir a Pesquisa)
caused netw » caused death (Expandir a Pesquisa), caused fetal (Expandir a Pesquisa)
pcr compare » pcr compared (Expandir a Pesquisa), cr compared (Expandir a Pesquisa), pcr compas (Expandir a Pesquisa)
compare a » compare _ (Expandir a Pesquisa)
a nortes » a norte (Expandir a Pesquisa), a norreys (Expandir a Pesquisa), a north (Expandir a Pesquisa)
_ based » _ base (Expandir a Pesquisa), _ bases (Expandir a Pesquisa)
l bias » al bias (Expandir a Pesquisa), l bian (Expandir a Pesquisa), l bins (Expandir a Pesquisa)
dc pcr » dc por (Expandir a Pesquisa), mc pcr (Expandir a Pesquisa)

You can also try:

• Europeana
• Digital Public Library of America
• CORE

Pode obter mais resultados ajustando a pesquisa.

• Performing a fuzzy search may retrieve terms with similar spellings: (( j l bias caused netw ) or ((( dc pcr compare a nortes ) or ( _ based companies can new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l bias caused netw ) OR ((( dc pcr compare a nortes ) OR ( _ based companies can new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l bias caused netw ) or ((( dc pcr compare a nortes ) or ( _ based companies can new ))))*.