NEW YORK (AP) — Many retailers are reporting modest gains for August as shoppers spent cautiously on clothing. The results cap a disappointing back-to-school selling season that raises questions about whether Americans will spend during the winter holidays, the biggest shopping period of the year.

Revenue at stores opened at least a year — an industry measure of a retailer's health— rose 3.7 percent in August, a small uptick from the 3.5 percent gain from July, according to a preliminary tally of 8 retailers by the International Council of Shopping Centers. The figure excludes drug store chains.

Clothing chain Cato Corp. was among the retailers that posted a decline, while L Brands Inc. posted a sales increase that was a bit below Wall Street expectations.