Project Runeberg has published the following works by this author:
Find other Nordic Authors named Ingstad,
others born in 1840
or deceased in 1925.
Look for more information in
Det Kgl. Bibliotek,
Google (search,
book search),
Hathi Trust,
Internet Archive,
Kansalliskirjasto (catalog,
digi,
metadata),
Kungl. biblioteket (Libris,
tidningar),
Nasjonalbiblioteket (aviser,
bøker,
Oria,
tidsskrifter),
Project Gutenberg,
Yahoo.