These translations originally published in 'The Oxford Ibsen'. Vol.6. 1960.
En folkefiende. An enemy of the people. - Vildanden. The wild duck. - Rosmersholm.
OBNB doesn't sell books, but you may be able to find a copy at one of these websites:
Ibsen: plays by Henrik Ibsen. ISBN 0192811096. Published by Oxford University Press in 1971. Publication and catalogue information, links to buy online and reader comments.
