[1]
Sherma, Y.P., Singhvi, A.K., Agrawal, D.P., Gaulin, B. and Hedgcock, F.T. 1981. Physical research laboratory TL dates - 1981 (II). Ancient TL. 5, 2 (Mar. 1981), 6–8. DOI:https://doi.org/10.26034/la.atl.1981.047.