Spanish Relativity Meeting Valladolid, Spain, ebrary, Inc, & Pascual Sánchez, J. F. (2001). Proceedings of the XXIII Spanish Relativity Meeting on Reference Frames and Gravitomagnetism: Valladolid, Spain, 6-9 September 2000. World Scientific.

Spanish Relativity Meeting Valladolid, Spain, Inc ebrary, and J. F. Pascual Sánchez. Proceedings of the XXIII Spanish Relativity Meeting on Reference Frames and Gravitomagnetism: Valladolid, Spain, 6-9 September 2000. Singapore ; River Edge, N.J.: World Scientific, 2001.

Spanish Relativity Meeting Valladolid, Spain, et al. Proceedings of the XXIII Spanish Relativity Meeting on Reference Frames and Gravitomagnetism: Valladolid, Spain, 6-9 September 2000. World Scientific, 2001.