De Swardt, A. M. J. <br/><br/>
The coal resources of Nigeria, 
by A. M. J. de Swardt and O. P. Casey. With a section on the physical and chemical properties of the coals, compiled by G. Jefford. 
 - [Lagos,  Govt. Printer]  1961. 
 - x, 100 p.  and portfolio (fold. maps, diagrs.)  plates, map, tables.  24 cm  25 cm. 
<br/><br/> Orignial imprint date covered by label: 1963. 
<br/><br/>Bibliography: p. 61. 
<br/><br/><label>LCCN: </label>gs 64000439  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Coal mines and mining--Nigeria.
<br/><br/><label>LC Class. No.: </label>TN810.N5  / D4