Volume 1 and 2. There are two series. The first run is $1.95 each, undated covers. (May 1990 through October 1990) These are listed in series
http://www.comics.org/series/17978/ Super Mario Bros. (Acclaim / Valiant, 1990 Series) A reprint run started the following year. Each is $1.50, with months on the covers (starting with February 1991). The second run uses different covers and may have different contents. These are listed in series
https://www.comics.org/series/174295/ Super Mario Bros. (Acclaim / Valiant, 1991 Series).
Both series are labeled as Vol. 1 in indicia.
ISSN 1049-1503.