Powell, Virginia P.
Balancing chemical equations / Virginia P Powell. - New Jersey : Printince-Hall, 1965. - 69 p. ; 23 cm. - Programmed unit in chemistry ; v. 5. .
Chemistry --Programmed instruction.
Chemical equations.
540 / POB
Balancing chemical equations / Virginia P Powell. - New Jersey : Printince-Hall, 1965. - 69 p. ; 23 cm. - Programmed unit in chemistry ; v. 5. .
Chemistry --Programmed instruction.
Chemical equations.
540 / POB
