| Authors(s) | Schmid, J.M., J.C. Mitchell and R.E. Stevens |
| Year | 1981 |
| Title | Cydia youngana (Kearfott) (lepidoptera: Tortricidae) and associates in Engelmann spruce cones, Fraser Experimental Forest, Colorado 1974-1977. Research Note, Forest Service, United States Department of Agriculture, RM 394, 5 pp. |