61
Date 1894
Subjects: ';
“...inkomen...”
meerdelige publicatie
62
Date 1902
Subjects: ';
“...inkomen...”
monografie
63
64
Date 1948
Subjects: ';
“...inkomen...”
monografie
65
Op titelpagina : sixième question à l'ordre du jour
Date 1948
Subjects: ';
“...inkomen...”
monografie
66
Subjects: ';
“...inkomen...”
monografie
67
68
69
70
71
72
Date 1985
Subjects: ';
“...inkomen...”
monografie
73
Date 1950
Subjects: ';
“...inkomen...”
monografie
74
Date 1983
Subjects: ';
“...inkomen...”
monografie
75
CIERP is de afkorting van Centre Intersyndical d'Etudes et de Recherches de Productivité
Date 1964
Subjects: ';
“...inkomen...”
monografie
76
77
Date [s.a.]
Subjects: ';
“...inkomen...”
monografie
78
Date 1935
Subjects: ';
“...inkomen...”
monografie
79
Date [1955?]
Subjects: ';
“...inkomen...”
monografie
80