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

1974 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.

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

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

1984 NHRA DRAG RULES Drag Racing's Official Guidelines, National Hot Rod Assn.

1983 NHRA DRAG RULES Drag Racing's Official Guidelines, National Hot Rod Assn.

1971 NHRA RULE BOOK DRAG RULES NATIONAL HOT ROD ASSOCIATION