AU  - Singhal,Om Prakash  .
TI  - Prayojanmoolak vyavhaarik hindi / 
SN  - 81 88125 21 0
U1  - 891.43 
PY  - 2007///
CY  - N.Delhi
PB  - Jagat ram & sons, 
KW  - Hindi
ER  -