Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Russian
⇄
Czech
English
French
German
Italian
G
o
o
g
l
e
|
Forvo
|
+
скачок Бальмера
stresses
astr.
discontinuité de Balmer
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
