Syrocki, B. John.
What is a machine / B. John Syrocki. - Chicago : Benefic Press, 1960. - 48 p. : ill. ; 20 cm. - The what is it series. .
323 323
Machinery--Juvenile literature.
621.9 / S85w
What is a machine / B. John Syrocki. - Chicago : Benefic Press, 1960. - 48 p. : ill. ; 20 cm. - The what is it series. .
323 323
Machinery--Juvenile literature.
621.9 / S85w