Left panel: superposition of the IRAC images at 8.0 μm (red) and 5.6 μm (green) with the Hα emission (blue), of a section of the H ii region Sh2-54 including the environs of WR 113. The cross marks the position of the WR star. Right panel: VLA image at 1465 MHz showing the ionized ring. The crosses mark the positions of the 143 points observed in ¹²CO lines. The color scale goes from 1 to 40 mJy beam^-1. The synthesized beam of the radio continuum observations and the beams of the molecular data are indicated in the bottom part of the image.