| 
1st Author:
 | 
Becker, Ralph Thomas 
 | 
| 
2nd Author:
 | 
 | 
| 
3rd Author:
 | 
 | 
| 
Year:
 | 
1993 | 
| 
Title:
 | 
Anoxia, eustatic changes, and Upper Devonian to lowermost Carboniferous global ammonoid diversity. | 
| 
Reference:
 | 
In: M.R.House, The Ammonoidea: Environment, Ecology, and Evolutionary Change, Systematics Association Special Volume, 47: 115-163, 11 figs., Oxford. | 
| 
Keywords:
 | 
U.Devon.,L.Carbon.; diversity | 
| 
Link:
 | 
	
 |