TY  - GEN
AU  - Balasubramanian, P 
AU  - Viji, P 
AU  - Kumar, E santhana 
TI  - A textbook of user studies and informatrics 
SN  - 9788194739807 (hb)
U1  - 020.72 BAL/Tex  
PY  - 2021///
CY  - New delhi
PB  - Ess Ess Publications
KW  - informetrics
ER  -