SHERMA, Y. P.; SINGHVI, A. K.; AGRAWAL, D. P.; GAULIN, B.; HEDGCOCK, F. T. Physical research laboratory TL dates - 1981 (II). Ancient TL, [S. l.], v. 5, n. 2, p. 6–8, 1981. DOI: 10.26034/la.atl.1981.047. Disponível em: https://www.ancienttl.org/article/view/6309. Acesso em: 1 may. 2025.