1 <!ENTITY preface SYSTEM
"../preface/preface.xml">
2 <!ENTITY pf-foreword SYSTEM
"../preface/foreword.xml">
3 <!ENTITY pf-whoread SYSTEM
"../preface/whoread.xml">
4 <!ENTITY pf-whonotread SYSTEM
"../preface/whonotread.xml">
5 <!ENTITY pf-prerequisites SYSTEM
"../preface/prerequisites.xml">
6 <!ENTITY pf-organization SYSTEM
"../preface/organization.xml">
