Architects' Data by Ernst Neufert, commonly referred to as "The Neufert," is the definitive international reference for spatial requirements and building design. Now in its 5th English Edition
If you manage to locate a legitimate digital copy (more on that below), you will find: neufert architects 39 data 5th edition pdf top
Disclaimer: This article recommends obtaining digital content through legal, paid channels to support the authors and publishers who maintain this critical industry standard. Architects' Data by Ernst Neufert, commonly referred to