Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
German
⇄
Dutch
English
French
G
o
o
g
l
e
|
Forvo
|
+
Theorie der konzentrischen Zonen
gen.
concentric zone theory
;
circular theory
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
