Crowther, J <br/><br/>
The Gunong Gagah - Tempurong Massif, Perak and its associated care system, Gua Tempurong 
J. Crowther. 
 - [19?_] 
 - 17 p.  ill.  30 cm 
<br/><br/> The limestone hills of the Malay Peninsular, particulary those near urban areas, such as in the Kinta Valley, Perak, are seriously threated by quarrying. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Limestone--Perak--Gua Tempurong<br/>Quarries and quarrying--Perak--Gua Tempurung
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Gua Tempurong (Perak)