Griffiths, Rachel.

Why do bridges arch? : and other structural questions / Rachel Griffiths. - Markham, Ont. : Scholastic, c2007. - 16 p. : col. ill. ; 23 cm. - Why is it so? Science Pan Canadian science Place. .

ISBN: 9780779174133 (pbk.)

Nat. Bib. No.: GBB045969 bnb

Subjects--Topical Terms:
Bridges--Miscellanea.

Dewey Class. No.: 580