diff --git a/README.md b/README.md
index ac4b5a0..3e50671 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # Macro Core
 [![npm package][npm-image]][npm-url]
 [![Github Workflow][githubworkflow-image]][githubworkflow-url]
-[![npm](https://img.shields.io/npm/dt/@sasjs/core)]()
+![npm](https://img.shields.io/npm/dt/@sasjs/core)
 ![Snyk Vulnerabilities for npm package](https://img.shields.io/snyk/vulnerabilities/npm/@sasjs/core)
 [![License](https://img.shields.io/apm/l/atomic-design-ui.svg)](/LICENSE)
 ![GitHub top language](https://img.shields.io/github/languages/top/sasjs/core)
diff --git a/base/mp_getpk.sas b/base/mp_getpk.sas
index 0583058..1bf4e38 100644
--- a/base/mp_getpk.sas
+++ b/base/mp_getpk.sas
@@ -37,6 +37,7 @@
 
   <h4> Related Macros </h4>
   @li mp_getpk.test.sas
+  @li mp_guesspk.sas
 
   @version 9.3
   @author Macro People Ltd
diff --git a/base/mp_guesspk.sas b/base/mp_guesspk.sas
index a8b9200..2ef1049 100644
--- a/base/mp_guesspk.sas
+++ b/base/mp_guesspk.sas
@@ -1,32 +1,37 @@
 /**
-  @file mp_guesspk.sas
+  @file
   @brief Guess the primary key of a table
-  @details Tries to guess the primary key of a table based on the following logic:
+  @details Tries to guess the primary key of a table based on the following
+  logic:
 
       * Columns with nulls are ignored
       * Return only column combinations that provide unique results
-      * Start from one column, then move out to include composite keys of 2 to 6 columns
+      * Start from one column, then move out to composite keys of 2 to 6 columns
 
   The library of the target should be assigned before using this macro.
 
   Usage:
 
-      filename mc url "https://raw.githubusercontent.com/sasjs/core/main/all.sas";
+      filename mc url
+        "https://raw.githubusercontent.com/sasjs/core/main/all.sas";
       %inc mc;
       %mp_guesspk(sashelp.class,outds=classpks)
 
   @param baseds The dataset to analyse
   @param outds= The output dataset to contain the possible PKs
-  @param max_guesses= The total number of possible primary keys to generate.  A
-    table is likely to have multiple unlikely PKs, so no need to list them all. Default=3.
-  @param min_rows= The minimum number of rows a table should have in order to try
-    and guess the PK.  Default=5.
+  @param max_guesses= (3) The total number of possible primary keys to generate.
+    A table may have multiple unlikely PKs, so no need to list them all.
+  @param min_rows= (5) The minimum number of rows a table should have in order
+    to try and guess the PK.
 
   <h4> SAS Macros </h4>
   @li mf_getvarlist.sas
   @li mf_getuniquename.sas
   @li mf_nobs.sas
 
+  <h4> Related Macros </h4>
+  @li mp_getpk.sas
+
   @version 9.3
   @author Allan Bowe
 
@@ -196,7 +201,8 @@
           %let lev4=%scan(&posspks,&l);
           %if &lev1 ne &lev4 and &lev2 ne &lev4 and &lev3 ne &lev4 %then %do;
             /* check for four level uniqueness */
-            proc sort data=&pkds(keep=&lev1 &lev2 &lev3 &lev4) out=&tmpds noduprec;
+            proc sort data=&pkds(keep=&lev1 &lev2 &lev3 &lev4)
+                out=&tmpds noduprec;
               by _all_;
             run;
             %if %mf_nobs(&tmpds)=&rows %then %do;
@@ -233,7 +239,8 @@
             %let lev5=%scan(&posspks,&m);
             %if &lev1 ne &lev5 & &lev2 ne &lev5 & &lev3 ne &lev5 & &lev4 ne &lev5 %then %do;
               /* check for four level uniqueness */
-              proc sort data=&pkds(keep=&lev1 &lev2 &lev3 &lev4 &lev5) out=&tmpds noduprec;
+              proc sort data=&pkds(keep=&lev1 &lev2 &lev3 &lev4 &lev5)
+                  out=&tmpds noduprec;
                 by _all_;
               run;
               %if %mf_nobs(&tmpds)=&rows %then %do;
@@ -282,7 +289,8 @@
                 run;
                 %if %mf_nobs(&tmpds)=&rows %then %do;
                   proc sql;
-                  insert into &outds values("&lev1 &lev2 &lev3 &lev4 &lev5 &lev6");
+                  insert into &outds
+                    values("&lev1 &lev2 &lev3 &lev4 &lev5 &lev6");
                   %if %mf_nobs(&outds) ge &max_guesses %then %do;
                     %put &sysmacroname: Max PKs reached at Level 6 for &baseds;
                     %return;