Topic
Aves
46
birds
46
ptaki
41
Poland
40
hist
32
Microtus arvalis
30
Ethnology. Social and cultural anthropology
23
GN301-674
23
congresses
23
B1-5802
19
Philosophy (General)
19
H
18
Social Sciences
18
geo
18
scipo
18
Duck Hawk
17
Falco peregrinus
17
Falconidae
17
J
17
Peregrine Falcon
17
Political science
17
sokoĊowate
17
Literature (General)
16
PN1-6790
16
envir
16
Ecology
14
Environmental sciences
14
GE1-350
14
Iceland
14
QH540-549.5
14
phil
14
P1-1091
13
Philology. Linguistics
13
HM401-1281
12
Sociology (General)
12
Education
11
L
11
art
11
density
11
litt
11
D
10
History (General) and history of Europe
10
Language and Literature
10
P
10
birds of prey
10
lang
10
AZ20-999
9
B
9
DK1-4735
9
History of Russia. Soviet Union. Former Soviet Republics
9
more ...