Yash Pal Vedi <br/><br/>
Social and Preventive medicine 

 - 15th 
 - New Delhi  Atma Ram & sons  1988 
 - xii, 539 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Previntive Medicine--Previntive MedicineWaterAir and Ventilationfamily Planning