TY  - BOOK
AU  - Heiland,Robert E and Richardson,Wallace J.
TI  - Work Sampling
U1  - 658.542 HEI 
PY  - 1957///
CY  - New York
PB  - McGraw-Hill Book Company,Inc
KW  - Statistics, Some Examples of the Use of Work Sampling,Some Theory pf Sampling in General
ER  -