Hollingworth, S. E. <br/><br/>
The Northampton sand ironstone :  stratigraphy, structure and reserves. 

 - London :  Geol.Surv.,  1951. 
 - 211 p. :  il. ;  24 cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Estratigrafía
<br/><br/><label>Index Terms--Genre/Form: </label><br/>Libro
<br/><br/><label>Universal Decimal Class. No.: </label>551.7(425)