TY  - SER
AU  - Bergh, Ir J. P. van den,
TI  - Netherlands Journal of Agricultural Science Vol. 27(1-4), Vol. 28(1-4)
U1  - 630 
PY  - 1979///-80
CY  - Wageningen
PB  - Royal Netherlands Society for Agricultural Science
KW  - Agriculture. & related technologies
ER  -