Clarion Books,, c1987.
150 p. : ill. ; 24 cm.

Holiday House,, c1989.
[30] p. : ill. ; 21 x 26 cm.

Holiday House,, c1991.
p. cm.

Maxwell Macmillan In, c1994.
200 p. : ill., maps ; 27 cm.

Blackbirch Press,, 1996.
p. cm.

National Geographic Society ;, 1996.
1 v. (unpaged) : col. ill., maps ; 28 cm.

National Geographic Society,, 1996.
1 v. (unpaged) : col. ill. ; 29 cm.

Philomel Books,, 2000.
52 p. : col. ill. ; 30 cm.

National Geographic Society,, 2000.
48 p. : col. ill. ; 28 cm.

Dorling Kindersley Pub.,, 2001.
48 p. : col. ill., maps ; 24 cm.