The New York Times guide to reference materials original title: Who-what-when-where-how-why-made easy.
| Hovedforfatter: | |
|---|---|
| Format: | Bog | 
| Udgivet: | New York
          Warner Books
    
        c1979 | 
| Fag: | 
| Hovedforfatter: | |
|---|---|
| Format: | Bog | 
| Udgivet: | New York
          Warner Books
    
        c1979 | 
| Fag: |