TY  - BOOK
ED  - Indian Standard Institution                                                                                                                                                                                                                                    . 
TI  - Code of practice installation and observation of cross arms for measurement of internal vertical movement in earth dams IS:7500-1974 
U1  - 627.824 
PY  - 1985///
CY  - New Delhi : 
PB  - Indian Standards Institution , 
ER  -