Frost, Helen, 1949-
What are wedges? / by Helen Frost. - Mankato, Minn. : Pebble Books, c2001. - 24 p. : col. ill. ; 19 cm. - Looking at simple machines .
Includes bibliographical references (p. 23) and index.
0736808493
00009871
Wedges--Juvenile literature.
621.9/9
What are wedges? / by Helen Frost. - Mankato, Minn. : Pebble Books, c2001. - 24 p. : col. ill. ; 19 cm. - Looking at simple machines .
Includes bibliographical references (p. 23) and index.
0736808493
00009871
Wedges--Juvenile literature.
621.9/9