Talvez deva tentar algumas variações de ortografia:
crest derived » host derived (Expandir a Pesquisa)
current work » current world (Expandir a Pesquisa), current when (Expandir a Pesquisa)
work system » world system (Expandir a Pesquisa), network system (Expandir a Pesquisa)
system dan » system data (Expandir a Pesquisa), system dias (Expandir a Pesquisa), system der (Expandir a Pesquisa)
derived c » derived cell (Expandir a Pesquisa), derived cd34 (Expandir a Pesquisa)
j retinal » a retinal (Expandir a Pesquisa), 3 retinal (Expandir a Pesquisa), 7 retinal (Expandir a Pesquisa)
case dis » case disc (Expandir a Pesquisa), case di (Expandir a Pesquisa), case does (Expandir a Pesquisa)
i crest » i crestr (Expandir a Pesquisa), _ crest (Expandir a Pesquisa), a crest (Expandir a Pesquisa)
c dietz » c diez (Expandir a Pesquisa), e dietz (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: (((( i crest derived c dietz ) OR ( i current work system dan ))) OR ( j retinal nerve case dis ))~.
• Se adicionar um carácter universal pode recuperar variações da palavra pesquisada: (((( i crest derived c dietz ) or ( i current work system dan ))) or ( j retinal nerve case dis ))*.