1. 01. English Non Fiction Why do stars twinkle? and other nighttime questions / by Ripley, Catherine, Publication: Toronto : OWL Books, 1996 Date:1996 Availability: Copies available: (1), Actions:
2. 01. English Non Fiction Why is the sky blue? and other outdoor questions / by Ripley, Catherine, Publication: Toronto : OWL Books, 1997 . [32] p. : 27 cm. Date:1997 Availability: Copies available: (1), Actions:

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