He also established the publisher Ernst G. Mortensens forlag and a few magazines which sold well .
In 1928 , Mortensen established the publishing house Nasjonalforlaget , where he was director until 1934 .
Mortensen also established the publisher director     forlag and a few magazines which sold well .
In 1928 , Mortensen established the publishing house Nasjonalforlaget , where he was director until 1934 .