DUTTA, S. (2003). LET'S KNOW ABOUT POLAR REGIONS. UNICATE PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)DUTTA, SHYAMA. LET'S KNOW ABOUT POLAR REGIONS. PUNE: UNICATE PUBLICATIONS, 2003.
Lua MLA (9ú heag.)DUTTA, SHYAMA. LET'S KNOW ABOUT POLAR REGIONS. UNICATE PUBLICATIONS, 2003.
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