Notes on underdrainage from anti-malarial branch records, Public Works Department, Federation of Malaya, and "the principles of underdrainage" by R. D. Walker 

 - Malaysia:  Public Works Department, Federation of Malaya,  1955 
 - 18p.:  ill.;  24cm 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Drainage<br/>Malaria