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In some instances, the collectors verbatim field numbers, which typically include the date or at least year, could be used to extract accurate date information.

Many of our oldest records , collected during Texas boundary and rail road surveys in the early to mid-1800's lacked dates. In version 3 of the database we updated most of the oldest records lacking dates by reviewing the original survey reports and maps to find dates or extrapolate date ranges.

Step 5: Editing Determiner

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