Polar bears in trouble - Waring, Rob.; National Geographic Society (U.S.) (London : Heinle/ Cengage Learning, 2009)
Footprint reading library with video from National Geographic.
Level B2 Upper-intermediate (2200 headwords).
Keywords: English language -- Study and teaching; İngiliz dili -- Öğretim; English language -- Readers; İngiliz dili -- Okuma kitapları