Talvez deva tentar algumas variações de ortografia:
mater jochem » mattner jochen (Expandir a Pesquisa), walter jochen (Expandir a Pesquisa), boeter jochem (Expandir a Pesquisa)
lanier viola » walter viola (Expandir a Pesquisa)
mather hm » mather h (Expandir a Pesquisa), mather m (Expandir a Pesquisa), mather em (Expandir a Pesquisa)
viola med » viola d (Expandir a Pesquisa), viola e (Expandir a Pesquisa), viola mae (Expandir a Pesquisa)
j mather » j mathew (Expandir a Pesquisa), j maher (Expandir a Pesquisa), j matthew (Expandir a Pesquisa)
b lanier » w lanier (Expandir a Pesquisa), l lanier (Expandir a Pesquisa), k lanier (Expandir a Pesquisa)
viola de » viola _ (Expandir a Pesquisa), viola a (Expandir a Pesquisa), viola b (Expandir a Pesquisa)
jochem b » jochen b (Expandir a Pesquisa), jochen h (Expandir a Pesquisa), jochen c (Expandir a Pesquisa)
j mater » j matear (Expandir a Pesquisa), j mateu (Expandir a Pesquisa), j mateo (Expandir a Pesquisa)
viola m » viola _ (Expandir a Pesquisa), viola a (Expandir a Pesquisa), viola b (Expandir a Pesquisa)
hm b » ohm b (Expandir a Pesquisa), m b (Expandir a Pesquisa), h b (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 mather hm b lanier viola de ) or ( j mater jochem b maier ((viola med) OR (viola m)) ))~.
• Se usar operadores Booleanos, por favor insira-os com letras MAIÚSCULAS: (( j mather hm b lanier viola de ) OR ( j mater jochem b maier ((viola med) OR (viola m)) ))*.
• "As palabras AND, OR e NOT podem gerar pesquisas incorrectas; tente utilizar aspas": "(( j mather hm b lanier viola de ) or ( j mater jochem b maier ((viola med) OR (viola m)) ))*".