1
by Vraukó János
Published: 2010
Book
2
by Michalos, Alex C.
Published: 1991
Book
3
4
5
Published: 2004
Book
6
Published: 1977
Book
7
Published: 1978
Book
8
9
10
by Almássy György
Published: l989
Book
11
Published: [s.a.]
Book
12
Published: [s.a.]
Book
13
14
15
16
17
Published: 1993
Related title: A diákéletmód vizsgálata
Book
18
19
by Kériné Sós Júlia
Published: 1968
Book
20
by Lisznovszkij, V. T.
Published: 1974
Book