Ong, Yeoh Han <br/><br/>
Reconnaissance fieldwork in the Gunong Ledang area  Mt. Ophir, Sheet 114, Johore 
Ong Yeoh Han 
 -  1972 
 - 2v.  ill., maps, photos (b&w)  35cm. 
<br/><br/>V.1 Reconnaissance fieldwork in the Gunong Ledang area : Mt . Ophir , sheet 114, Johore / Ong Yeoh Han  --b V.2 Fieldwork in the Jementah Forest Reserves area / Siew Meng Fai, Za'aba Md. Hashim. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Geology--Field study--Johore--Gunong Ledang
<br/><br/><label>Subjects--Geographic Terms: </label><br/>Gunong Ledang (Johore)<br/>Jementah Forest Reserve (Johore)