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

1971 NHRA RULE BOOK DRAG RULES NATIONAL HOT ROD ASSOCIATION

1978 NHRA National Hot Rod Association NOS Drag Rules Book

NHRA 1972 DRAG RULES BOOKLET NATIONAL HOT ROD ASSOCIATION VINTAGE RACE CAR

1971 NHRA RULE BOOK DRAG RULES NATIONAL HOT ROD ASSOCIATION

1978 NHRA RULE BOOK NOS DRAG RULES NATIONAL HOT ROD ASSOCIATION NOS

1977 NHRA RULE BOOK DRAG RULES NATIONAL HOT ROD ASSOCIATION

1969 NHRA RULE BOOK DRAG RULES NATIONAL HOT ROD ASSOCIATION