PESTICIDE USAGE IN RELATION TO BEEKEEPING

[31] BILLINGS SC, 1966, B ENTOMOL SOC AM, V12, P556

[32] Bittner A., 1960, Zoologische Jahrbuecher (Physiol), V69, P125

[33] BLANCHARD OK, 1956, GLEANINGS BEE CULTUR, V84, P658

[34] BOCH R., 1965, AMER BEE J, V105, P166

[35] BOGDAN T, 1961, STIINT STAT CENT SER, V3, P315

[36] BOGNOCZKY G, 1957, MEHEZET BUDAPEST, V5, P45

[37] BOGOIAVLENSKY S. G., 1957, PCHELOVODSTVO, V34, P42

[38] BOGOYAVLENSKII SG, 1959, 4 REP C ALL ENT SOC, V2, P184

[39] BROWN AWA, 1951, INSECT CONTROL CHEMI

[40] BUBIEN Z., 1965, Pszczel. Zesz. nauk., V9, P57

[31] BILLINGS SC, 1966, B ENTOMOL SOC AM, V12, P556

[32] Bittner A., 1960, Zoologische Jahrbuecher (Physiol), V69, P125

[33] BLANCHARD OK, 1956, GLEANINGS BEE CULTUR, V84, P658

[34] BOCH R., 1965, AMER BEE J, V105, P166

[35] BOGDAN T, 1961, STIINT STAT CENT SER, V3, P315

[36] BOGNOCZKY G, 1957, MEHEZET BUDAPEST, V5, P45

[37] BOGOIAVLENSKY S. G., 1957, PCHELOVODSTVO, V34, P42

[38] BOGOYAVLENSKII SG, 1959, 4 REP C ALL ENT SOC, V2, P184

[39] BROWN AWA, 1951, INSECT CONTROL CHEMI

[40] BUBIEN Z., 1965, Pszczel. Zesz. nauk., V9, P57