Talvez deva tentar algumas variações de ortografia:
walter viola » walter vilella (Expandir a Pesquisa), walter villela (Expandir a Pesquisa), walter jolan (Expandir a Pesquisa)
master them » after them (Expandir a Pesquisa), master chef (Expandir a Pesquisa), master stem (Expandir a Pesquisa)
mader chem » made them (Expandir a Pesquisa), der chem (Expandir a Pesquisa)
maier biol » maier viola (Expandir a Pesquisa), maier il (Expandir a Pesquisa)
j master » j masters (Expandir a Pesquisa), j mater (Expandir a Pesquisa), j mcmaster (Expandir a Pesquisa)
j mader » j madera (Expandir a Pesquisa), j madsen (Expandir a Pesquisa)
d maier » b maier (Expandir a Pesquisa), _ maier (Expandir a Pesquisa), a maier (Expandir a Pesquisa)
viola m » viola _ (Expandir a Pesquisa), viola a (Expandir a Pesquisa), viola b (Expandir a Pesquisa)
chem d » chem de (Expandir a Pesquisa), chem _ (Expandir a Pesquisa), chem e (Expandir a Pesquisa)
biol m » biol 8 (Expandir a Pesquisa), fiol m (Expandir a Pesquisa), biol med (Expandir a Pesquisa)
them a » them _ (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 mader chem d maier biol m ) or ( j master them a walter viola m ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j mader chem d maier biol m ) OR ( j master them a walter viola m ))*.