blog post updated for 1951 layout, #728, metanorma/metanorma-iso#1089

_posts/2024-03-20-iso-old-layouts.adoc

@@ -46,6 +46,16 @@ The available values are: `1951`, `1972`, `1979`, `1987`, `1989`, `2012`, `2013`
 Note: The layout `2012` is similar to `1989`, but with changed logo in mid-2012.
 
 
+== Layout 1951 features
+
+The last page provides the 'Date of the first printing' and 'Price'. You can set these data by
+the document attributes `:presentation-metadata-first-printing-date:`, `:presentation-metadata-price:`, for instance:
+```
+:presentation-metadata-first-printing-date: 1965-12-01
+:classification: UDC:563.5.081:537.71
+```
+
+
 == Copyright statements
 
 Copyright text changed from year to year. Currently, Metanorma support a few predefined