Nolan/Vallée/Jiang/Lemke aerospace-forensics paper (2022).

'Improved instrumental techniques, including isotopic analysis, applicable to the characterization of unusual materials with potential relevance to aerospace forensics' — Progress in Aerospace Sciences, vol. 128 (2022), by Garry Nolan (Stanford), Jacques Vallee, Sizun Jiang, and retired NASA Ames engineer Larry Lemke. Lays out mass spectrometry, imaging, atom-probe tomography (APT), and isotopic techniques, applied to the historical Council Bluffs case (CB_JV 1, Dec 17, 1977). Across five subsamples there were no significant deviations from terrestrial isotopic norms; provenance and function remain unknown. Explicitly framed as a methods/chain-of-custody call, NOT a non-human-origin claim. Described as the first public study of UAP material at the atomic level.