TY - JOUR L1 - http://czasopisma.pan.pl/Content/89237/PDF/JPPR_53(4)_08_Andreev.pdf L2 - http://czasopisma.pan.pl/Content/89237 PY - 2013 IS - No 4 DO - 10.2478/jppr-2013-0053 A1 - Andreev, Radoslav A1 - Rasheva, Donka A1 - Kutinkova, Hristina PB - Committee of Plant Protection PAS PB - Institute of Plant Protection – National Research Institute VL - vol. 53 DA - 2013 T1 - OCCURRENCE AND POPULATION DENSITY OF APHIDS IN APPLE ORCHARDS OF SOUTH BULGARIA UR - http://czasopisma.pan.pl/dlibra/publication/edition/89237 T2 - Journal of Plant Protection Research ER -