Black and colored porous-tip pens on ivory paper
Sheet: 13 11/16 x 10 5/8 in. (34.8 x 27 cm)
Inscribed at lower right in black porous-tip pen: "SOUTH TOWER, TRADE CENTER / JULY 27, 1971 - FULL 110 STORIES"
Gift of the Richard Welling Family
Due to ongoing research, information about this object is subject to change.