Complete histories are available at the Geodetic Section. The results of special leveling surveys in subsidence areas are published in separate form. This information is available upon request in the Geodetic Section. Page numbers are printed in the upper left corner of each sheet and four digit edition numbers are printed in the lower right corner. This number represents the date of machine tabulation.
Page numbers function as indicators of continuity within an edition only.
Page numbers and edition numbers should not be used when referring to a bench mark or the index.