共 10 条
[2]
MACKENSEN O, 1970, 390 US DEP AGR AGR H, P28
[3]
MACKENSEN O, 1948, ET250 US BUR ENT PLA, P33
[4]
MACKENSEN OTTO, 1948, AMER BEE JOUR, V88, P412
[5]
POOLE H K, 1969, American Bee Journal, V109, P420
[7]
RUTTNER F, 1969, INSTRUMENTAL INSEMIN
[9]
TABER STEPHEN III, 1961, BEE WORLD, V42, P173
[10]
VELTHUIS H H W, 1970, Annales de l'Abeille (Paris), V1, P343, DOI 10.1051/apido:19700305