Talvez deva tentar algumas variações de ortografia:
serial computer » serial computed (Expandir a Pesquisa), special computer (Expandir a Pesquisa), medical computer (Expandir a Pesquisa)
nat clamp » dnan clamp (Expandir a Pesquisa), dna clamp (Expandir a Pesquisa), aaa clamp (Expandir a Pesquisa)
clamp can » clamp a (Expandir a Pesquisa), clamp ar (Expandir a Pesquisa), clamp cum (Expandir a Pesquisa)
clamp pcr » lamp pcr (Expandir a Pesquisa), clamp pcna (Expandir a Pesquisa), amp pcr (Expandir a Pesquisa)
pcr newts » pcr next (Expandir a Pesquisa), pcr new (Expandir a Pesquisa)
aided now » aided non (Expandir a Pesquisa), aided noma (Expandir a Pesquisa), aided nmr (Expandir a Pesquisa)
can near » can never (Expandir a Pesquisa), can new (Expandir a Pesquisa)
j serial » j serralt (Expandir a Pesquisa), j serra (Expandir a Pesquisa), j serna (Expandir a Pesquisa)
a clamp » _ clamp (Expandir a Pesquisa), a claims (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.

• Performing a fuzzy search may retrieve terms with similar spellings: (((( e nat clamp can near ) or ( j a clamp pcr newts ))) or ( j serial computer aided now ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (((( e nat clamp can near ) OR ( j a clamp pcr newts ))) OR ( j serial computer aided now )).
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( e nat clamp can near ) or ( j a clamp pcr newts ))) or ( j serial computer aided now ))*.