共 8 条
[1]
BORCHERT A, 1933, WEITERE UNTERSUCHUNG, V49, P193
[2]
BORCHERT A, 1931, ARCH BIENENKUNDE, V12, P336
[4]
HEAP CH, 1914, BRIT BEE J, V42, P123
[5]
MORGENTHALER O, 1931, SCHWEIZ BIENEN ZEIT, V54, P254
[6]
SCOTT JW, 1920, WYOMING AGR EXPT STA, V124, P80
[7]
WHITE GF, 1919, US DEP AGR B, V780
[8]
WINKEL AJ, 1939, NOSEMA ZIEKTE HAAR B