1.
The regional structure of employment in Germany, 1895-1970 ; Die regionale Struktur der Beschäftigung in Deutschland, 1895-1970
The regional structure of employment in Germany, 1895-1970 ... : Die regionale Struktur der Beschäftigung in Deutschland, 1895-1970 ...
The perpetual adversary: how Dutch security services perceived communism (1918-1989)
2.
The influence of popular beliefs about childbirth on fertility patterns in mid-twentieth-century Netherlands