Dave's down-to-earth rock shop
Stuart J. Murphy, Cat Bowman Smith (Illustrator)
As they consider sorting their rock collection by color, size, type, and hardness, Josh and Amy learn that the same objects can be organized in many different ways
Series
33 pages : color illustrations ; 22 x 26 cm.
9780060280185, 9780060280192, 9780064467292, 9780329145781, 9780758760630, 9780613214094, 0060280182, 0060280190, 0064467295, 0329145789, 0758760639, 0613214099
40359254
"Classifying; Level 3."