TY  - BOOK
AU  - Ruttner, F.
TI  - Queen rearing: biological basis and technical instruction
U1  - 638.145 21st ed.
PY  - 1983///
CY  - Bucharest
PB  - Apimondia Publishing House
KW  - Queen rearing
N1  - Index: p. 349-58
ER  -