The Stockton office is considered part of the San Joaquin Branch. Famous for the San Joaquin River Delta, which flows through the town, the area is primarily agricultural. This Yellow Pages sales office handles many small counties including Tuolumne County – home to the gold rush town of Sonora - and Calaveras County, site of the Celebrated Jumping Frog, and, Stanislaus County’s, Modesto, home to E & J Gallo, the largest exporter of California wines.