TY  - GEN
AU  - Lehmann E L, Dabrera HJ M
TI  - Non parametrics: statistical methods based on ranks
SN  - 0-8162-4996-6
U1  - 519.5 LEH 
CY  - Newyork, Mc Graw-Hill Book Co
KW  - Statistics/probability/non parametrics/sampling
ER  -