Johnson, Ryerson 1901- creator Baum, Willi illustrator text Massauchusetts Ginn and Company 1974 First published in Australia in 1976 monographic 16 unnumbered pages : color illustrations ; 19 cm . Introduces bulldozers, power shovels, ditch diggers, and other massive earthmoving machines. H 430 Lexile estimate H Raz-Plus Written by Ryerson Johnson. Illustrated by Willi Baum Earthmoving machinery Juvenile literature Earthmoving machinery PZ10.J573 624.152 0701522054 DLC 20240320132511.0 3562 eng