Sufia Kamal National Public Library Online Search for 'Provider:Oxford University Press, and au: Petter, Helen Mary'

Oxford junior encyclopaedia :

London : Oxford University Press, 1964 . Vols. : 25 cm. .

London : Oxford University Press, 1957 . Vols. : 25 cm. .

London : Oxford University Press, 1957 . Vols. : 25 cm. .

London : Oxford University Press, 1957 . Vols. : 25 cm. .

London : Oxford University Press, 1957 . Vols. : 25 cm. .

London : Oxford University Press, 1957 . Vols. : 25 cm. .

London : Oxford University Press, 1961 . Vols. : 25 cm. .

London : Oxford University Press, 1964 . Vols. : 25 cm. .