Population, environment and quality of life / Lennart Levi and Lars Andersson. - Levi, Lennart. (OLS)http://pul/name/39244; Andersson, Lars. (OLS)http://pul/name/39245 (Allmänna Förlaget, 1972)
Tit. della coperta.
In testa al front.: Royal Ministry for Foreign Affairs.
In calce al front.: A Contribution to the United Nations World Population Conference.

Manuale di economia sociale / Alessandro Cantono. - Cantono, Alessandro, 1874-1959, autore. (OLS)http://pul/name/54672
Bibliografia in nota a piè pagina.