Machines at Work
Find out all about tractors, from machines that lift, load, pull and push to the latest combine harvesters. Zoom in, see them up close and discover what makes them work. Then try the quiz to see how much you've learned!
Publisher: St. Catharines, ON : Crabtree, 012
Branch Call Number: 629.2252 GIF 2012
Characteristics: 24 p. : col. ill. ; 28 cm
Alternative Title: Tractors