->  codebook


month ------------------------------------------------------------------- Month
                  type:  string (str8)

         unique values:  2                    coded missing:  0 / 10

            tabulation:  Freq.  Value
                             5  "February"
                             5  "October"


date --------------------------------------------------------------------- Date
                  type:  numeric (byte)

                 range:  [12,20]                      units:  1
         unique values:  9                    coded missing:  0 / 10

            tabulation:  Freq.  Value
                             1  12
                             1  13
                             1  14
                             1  15
                             2  16
                             1  17
                             1  18
                             1  19
                             1  20


plane ------------------------------------------ Count from Fixed-Wing Airplane
                  type:  numeric (byte)

                 range:  [24,95]                      units:  1
         unique values:  9                    coded missing:  0 / 10

            tabulation:  Freq.  Value
                             1  24
                             1  31
                             1  32
                             1  35
                             1  39
                             2  47
                             1  76
                             1  85
                             1  95


copter -------------------------------------------------- Count from Helicopter
                  type:  numeric (byte)

                 range:  [30,85]                      units:  1
         unique values:  8                    coded missing:  0 / 10

            tabulation:  Freq.  Value
                             2  30
                             1  33
                             1  38
                             1  48
                             1  55
                             2  58
                             1  75
                             1  85


river ------------------------------------------------------------------- River
                  type:  string (str7)

         unique values:  2                    coded missing:  0 / 10

            tabulation:  Freq.  Value
                             5  "Crystal"
                             5  "Indian"

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