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)
comas caused » coma caused (Expandir a Pesquisa), domains caused (Expandir a Pesquisa), molars caused (Expandir a Pesquisa)
pcr compared » pcr coupled (Expandir a Pesquisa), pcr combined (Expandir a Pesquisa)
caused netw » caused death (Expandir a Pesquisa), caused fetal (Expandir a Pesquisa)
compared a » compared _ (Expandir a Pesquisa), compare a (Expandir a Pesquisa), compare _ (Expandir a Pesquisa)
l comas » l comps (Expandir a Pesquisa), l comeau (Expandir a Pesquisa)
a norte » a north (Expandir a Pesquisa)
_ based » _ base (Expandir a Pesquisa), _ bases (Expandir a Pesquisa)
c pcr » dc pcr (Expandir a Pesquisa), mc pcr (Expandir a Pesquisa), 3c 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 comas caused netw ) or ((( c pcr compared a norte ) or ( _ based companies can new ))))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j l comas caused netw ) OR ((( c pcr compared a norte ) OR ( _ based companies can new )))).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (( j l comas caused netw ) or ((( c pcr compared a norte ) or ( _ based companies can new ))))*.