TY  - BOOK
AU  - Van Den Ban, A.W.
AU  - Hawkins, H.S.
TI  - Agricultural Extension  / 
SN  - 0582028833
U1  - 630.715 22
PY  - 1988///
CY  - New York :
PB  - Langman Scientific &  Technical,, 
KW  - Agricultural extention
N1  - Includes bibliographical references
ER  -