TY - BOOK AU - Verdaguer E ed. ED - Relativity Meeting-89 (1989 : Barcelona) ED - Relativity Meeting-89 (1989 : Barcelona) TI - Recent developments in gravitation: proceedings U1 - 530.11 PY - 1990/// CY - Singapore PB - World Scientific KW - GraVITATION KW - Physics KW - Relativity ER -