[en] The authors have significantly extended the observations of CO emission from molecular clouds in a number of ways: (1) they have extended longitude coverage, and now have at least some data taken over the range 45 deg < l < 230 deg (with no data taken within 20 deg of the anticenter); (2) they have extended latitude coverage to enable to estimate the location of the midplane and the thickness of the CO emitting layer; (3) they have greatly extended the mapping, now having at least partial CO maps of 55 clouds, along with ¹³CO, C¹⁸O, CO(2 → 1), and 2-mm H₂CO observations of some clouds. (Auth.)