1947 McNally Pittsburg Harmattan Preparation Plant Ad - "Over the Horizon in '47 . . . The New Harmattan Preparation Plant"
1947 McNally Pittsburg Harmattan Preparation Plant Ad - "Over the Horizon in '47 . . . The New Harmattan Preparation Plant"

1947 McNally Pittsburg Harmattan Preparation Plant Ad - "Over the Horizon in '47 . . . The New Harmattan Preparation Plant"