Photograph of the German economist Horst Albach (1931–) with his wife Renate visiting Helsinki School of Economics. In the middle, professor Eero Pitkänen (1930–); to the right, professor Jaakko Honko (1922–2006).
<span lang="en">Anonymous</span><span style="display:none">Unknown author</span> / Helsingin kauppakorkeakoulu
Lehtonen, Eeva-Liisa: <i>Kauppatieteiden komea kaari</i>, p. 91. (Helsinki 2014.)