1. Breeding patterns of a North Swedish parish;Beckman;Hereditas,1961
2. The frequencies of cousin marriages in three North Swedish parishes;Böök;Hereditas,1948
3. Genetical investigations in a North Swedish population;Böök;Ann. Hum. Genet.,1947
4. Is national intelligence declining;Cattell;Eug. Rev.
5. The fate of national intelligence: Test of a thirteen year prediction;Cattell;Eug. Rev.,1951