National seminar on 'Patents systems':   Nov. 28-29, 1981 
/ National Geophysical Research Institute 
 - Hyderabad:   National Geophysical Research Institute,   1981 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Information science
<br/><br/><label>Subjects--Index Terms: </label>Patents 
<br/><br/><label>Universal Decimal Class. No.: </label>D 608(082.2)   / M1