Griffiths, Rachel.

Why are soils different colours? : and other earthy questions / Rachel Griffiths. - Markham, Ont. : Scholastic, c2007. - 16 p. : col. ill. ; 23 cm. - Why is it so? Science Pan Canadian Science Place. .

ISBN: 9780779174157 (pbk.)

Nat. Bib. No.: GBB045969 bnb

Subjects--Topical Terms:
Soil--Miscellanea.

Dewey Class. No.: 631.4