https://openlibrary.org/books/OL5926629M.opdsNorwegian patents relating to whaling and the whaling industry a statistical and historical analysis.2020-09-30T04:30:13ZArne Odd Johnsenhttps://openlibrary.org/authors/OL1142290A/Arne_Odd_JohnsenA.W. Brøggers boktr.Oslo1947212 p.enghttps://openlibrary.org/books/OL5926629M1098905264043711