TY  - BOOK
T1  - Land subsidence.
LA  - English
PP  - New York
PB  - Unesco
YR  - 1969
UL  - https://tuklas.up.edu.ph/Record/UP-99796217607997990
OP  - 661
CN  - GB481 L35 v.2 1969
KW  - Subsidences (earth movement)
ER  -