December 18, 1972 |Volume 7, Number 23

November 27, 1972 |Volume 7, Number 22

November 13, 1972 |Volume 7, Number 21

October 31, 1972 |Volume 7, Number 20

October 16, 1972 |Volume 7, Number 19

October 2, 1972 |Volume 7, Number 18

September 18, 1972 |Volume 7, Number 17

September 5, 1972 |Volume 7, Number 16

August 21, 1972 |Volume 7, Number 15

August 7, 1972 |Volume 7, Number 14

July 17, 1972 |Volume 7, Number 13

July 3, 1972 |Volume 7, Number 12

June 12, 1972 |Volume 7, Number 11

May 22, 1972 |Volume 7, Number 10

May 8, 1972 |Volume 7, Number 9

April 24, 1972 |Volume 7, Number 8

Special issue: dot state highway safety evaluations

April 10, 1972 |Volume 7, Number 7

March 28, 1972 |Volume 7, Number 6

March 13, 1972 |Volume 7, Number 5

February 28, 1972 |Volume 7, Number 4

February 14, 1972 |Volume 7, Number 3

January 31, 1972 |Volume 7, Number 2

January 17, 1972 |Volume 7, Number 1