Tomlinson, Brian. Superbird [graded reader: elementary] - Cambridge : Cambridge University Press, 1999. - 48 p. : ill. ; 20 cm. - Cambridge English readers. Level 2 . ISBN: 0521656087 LCCN: 2001270347 Nat. Bib. No.: GB99-Z5906 Subjects--Topical Terms: Science fiction. LC Class. No.: PZ7.T596 / Sup 1999