Sarvela, Jaakko (1914-1996). (Personal Name)

Botanika.

The Dryopteris spinulosa complex in Finland / Carl-Johan Widén, Jaakko Sarvela and Teuvo Ahti. - Helsinki, 1967.

HyK online

Strona Jstor Plants Science (28.01.2013) http://plants.jstor.org/person/bm000368349

The Natural History Museum, London, 29.01.2013 http://www.nhm.ac.uk/research-curation/library/archives/catalogue/dserve.exe?dsqServer=placid&dsqIni=Dserve.ini&dsqApp=Archive&dsqCmd=Show.tcl&dsqDb=Persons&dsqPos=64&dsqSearch=%28Surname%3Ds*%29