APA
Keranen J. (., . (1973). Collected papers to commemorate the 60th anniversary of the sodankyla observatory. Helsinki: The Finnish Academy of Science and Letters.
Chicago
Keranen J (Ed.), . 1973. Collected papers to commemorate the 60th anniversary of the sodankyla observatory. Helsinki: The Finnish Academy of Science and Letters.
Harvard
Keranen J. (., . (1973). Collected papers to commemorate the 60th anniversary of the sodankyla observatory. Helsinki: The Finnish Academy of Science and Letters.
MLA
Keranen J (Ed.), . Collected papers to commemorate the 60th anniversary of the sodankyla observatory. Helsinki: The Finnish Academy of Science and Letters. 1973.
