Update entity documentation to include link to sample data entry shee…

…ts section.

source/incidents.rst

@@ -12,6 +12,8 @@ For each incident, we include data about what happened and when, the location(s)
 
 In a departure from how we compile data about :doc:`units` and :doc:`persons`, individual fields in incident records are not sourced and rated for confidence. Rather, we provide a single source for the entire incident. This is because each incident is a direct copy of material from a single source rather than a tapestry of material from a range of different sources.
 
+A spreadsheet containing all the fields used by Security Force Monitor can be found in the section called :ref:`Sample Data Entry Sheets`.
+
 Incident: Unique Identifying Number
 -----------------------------------
 

source/persons.rst

@@ -10,6 +10,8 @@ The fields in the "Persons" data capture format are used to record basic details
 
 This data capture format is supplemented by the "Persons Extra" format, which enables the capture of other biographical details (like their date of birth, and then they may have died), their social media accounts, and media that provide information about how a person looks and sounds.
 
+A spreadsheet containing all the fields used by Security Force Monitor can be found in the section called :ref:`Sample Data Entry Sheets`.
+
 Person: Unique Identier
 -----------------------
 

source/persons_extra.rst

@@ -5,6 +5,8 @@ The "Persons Extra" data capture format is used to extend the data in the :doc:`
 
 It also serves the purpose of grouping resources that are *ipso facto* - resources that are valuable in themselves, and not only as sources for other data points. This provides the Staff Analyst with a collection of audiovisual media resources that can be used to identify and further research the person.
 
+A spreadsheet containing all the fields used by Security Force Monitor can be found in the section called :ref:`Sample Data Entry Sheets`.
+
 Person Extra: Name
 ------------------
 

source/sources.rst

@@ -26,6 +26,8 @@ We also identify non-digital resources such as monographs, scholarly literature,
 
 Sources can also be published in a range of different media forms, not only text. Other media forms may include maps, images, audio recordings, video, social media posts, messages send through messaging services. We have designed the data capture format for sources to be flexible enough to accomodate a wide range of different media.
 
+A spreadsheet containing all the fields used by Security Force Monitor can be found in the section called :ref:`Sample Data Entry Sheets`.
+
 Sources and Access Points
 -------------------------
 

source/units.rst

@@ -14,6 +14,8 @@ Documented in this section of the handbook are field describing the following di
 -  their areas of operations; and,
 -  memberships in joint operations or international peacekeeping missions.
 
+A spreadsheet containing all the fields used by Security Force Monitor can be found in the section called :ref:`Sample Data Entry Sheets`.
+
 Unit: Unique Identifier
 -----------------------