1971 NHRA RULE BOOK DRAG RULES NATIONAL HOT ROD ASSOCIATION

1997 NHRA RULE BOOK DRAG RULES BOOK - NATIONAL HOT ROD ASSOCIATION Racing Track

1974 NHRA DRAG RULES - Drag Racing's Official Guidelines, National Hot Rod Assn

1997 NHRA RULE BOOK DRAG RULES BOOK - NATIONAL HOT ROD ASSOCIATION Racing Track

1992 NHRA Drag Racing National Hot Rod Association Rulebook 6479

1975 NHRA DRAG RULES Drag Racing's Official Guidelines, National Hot Rod Assn.

1973 NHRA DRAG RULES Drag Racing's Official Guidelines, National Hot Rod Assn.

1971 NHRA DRAG RULES Drag Racing's Official Guidelines, National Hot Rod Assn.