Hegerl GC, Crowley TJ, Allen M, Hyde WT, Pollack HN, et al. (2007) Detection of Human Influence on a New, Validated 1500-Year Temperature Reconstruction. Journal of Climate: Vol. 20, No. 4 pp. 650–666 | Hegerl GC, Crowley TJ, Allen M, Hyde WT, Pollack HN, et al. (2007) Detection of Human Influence on a New, Validated 1500-Year Temperature Reconstruction. Journal of Climate: Vol. 20, No. 4 pp. 650–666 |