Weller, Susan C.
Systematic data collection / Susan C. Weller & A. Kimbail Romney - New Delhi : Saga Publications , 1988 - 96p. : ill. ; 23 cm.
0803930739 0803930747
data collection
300 / WEL
Systematic data collection / Susan C. Weller & A. Kimbail Romney - New Delhi : Saga Publications , 1988 - 96p. : ill. ; 23 cm.
0803930739 0803930747
data collection
300 / WEL