=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 11-Jun-1991
Jolo                660/141 RLR(1963) is 9.3m below BM1
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 17-Jun-1993
December 1959 for Jolo is anomalously large.
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 30-Mar-1999
gauge type = Leupold & Stevens/EMS-16
=========================== FOLLOWING PSMSL DOCUMENTATION ADDED 29-Jul-1999
For 1996 there is no change in the datum of observations reported.  There are lengthy gaps which may be relevant to the apparent higher values.