@article{NordbyHall, author = {Nordby, Vernon J. and Hall, Calvin S.}, title = {A Guide to Psychologists and Their Concepts, San Francisco (W. H. Freeman) 1974.}, language = {en} } @article{HallNordby, author = {Hall, Calvin S. and Nordby, Vernon J.}, title = {A Guide to Psychologists and Their Concepts, San Francisco (W. H. Freeman) 1974.}, language = {en} }