Tough set to grade. Cards don't show a lot of wear, but there is a TON of printer's snow throughout. If that drops the cards with snow by two grades, it probably drops the set over all to EX+ Key Cards:
#10 Kareem Abdul-Jabbar EX very minor snow, but one of the few cards with more noticeable corner wear
#20 Julius Erving EX/MT minor snow and tiny corner touches
#31 Alex English Rookie EX+ moderate printer's snow, minor corner wear
#60 Pete Maravich EX, heavier splotches of printer's snow one lightly touched corner