p. vs pp. in Italian style

dml0sc

I am trying to modify this style: Università Pontificia Salesiana (Italiano) already included in the style repository. I need to create a new style based on that adding p. and pp. to pages in cases in which there is single or multiple page numbers. I cannot figure it out. Any help?

damnation

Exchange the current "locators" macro with this:
<macro name="locators">
<choose>
<if locator="page">
<group delimiter=" ">
<label variable="locator" form="short"/>
<text variable="locator" prefix=" "/>
</group>
</if>
<else-if locator="paragraph">
<group>
<label variable="locator" form="symbol" strip-periods="true"/>
<text variable="locator" prefix=" "/>
</group>
</else-if>
<else>
<group>
<label variable="locator" form="short"/>
<text variable="locator" prefix=" "/>
</group>
</else>
</choose>
</macro>