TY - BOOK T1 - Suggested methods for monitoring rock movements using borehole extensometers T2 - Committee on Field Tests; No. 5 LA - English PB - International Society for Rock Mechanics. Commission on Standarization of Laboratory and Field Tests YR - 1977 UL - http://vufind10-pruebas.sigbunlp.bibliotecas.unlp.edu.ar/Record/dfi.23929 ER -