Comunicações dos Serviços Geológicos de Portugal.
Serviços Geológicos de Portugal,issuing body.
Lisboa : Os Serviços,
1922-1992.
Some volumes issued in multiple parts.
Separately-paged supplements accompany some volumes.
Geology
Also issued online.
Comunicações da Comissão do Serviço Geológico de Portugal
Comunicações (Instituto Geológico e Mineiro (Portugal))