1st Printing: The first printing is highly sought after by collectors and thus more valuable.
It has the TSR lizard man logo on the cover. There's no printing information given on the first page of the booklet.
(see picture above).
2nd to 6th Printing: The second printing has the TSR lizard man logo on the cover.
The distinguishing printing information is given on the first page of the booklet.
7th to 8th printings: The 7th to 8th printing and possible later printings feature the TSR wizard logo. The distinguishing printing information is given on the first page of the booklet.