Apidologie no 6/90 has just been issued. Here is its contents:
 
1) huang z.Y., OTIS G.W., TEAL P.E.A.
Nature of brood signal activating the protein synthesis of hypopharyngeal gland 
in honey bees Apis mellifera
pp. 455-464
University of Guelph, Department of Environmental Biology
Guelph Ontario N1G 2W1 (Canada)
 
2) PUNNETT E.N., WINSTON M.L.
A comparison of package and nucleus production from honey bee colonies
pp. 465-472
Simon Fraser University, Department of Biological Sciences
Burnaby B.C. V5A 1S6 (Canada)
 
3) MOLZAHN D., KLEPSCH A., ASSMANN-WERTMULLER U.
Transfer of radioactive cesium from soil to rape plants, rape blossoms and rape 
honey
pp. 473-483 (in German, English detailed summary)
Kernchemie im Fachbereich Physikalische Chemie, Philipps Universitat Marburg
D-3575 Kirchhain (GFR)
 
4) KEVAN P.G.
How honey bees forage for pollen at skunk cabbage Symplocarpus foetidus (Araceae
)
pp.485-490
University of Guelph, Department of Environmental Biology
Guelph Ontario N1G 2W1 (Canada)
 
5) Proceedings of the Working Group of the Apicultural Institutes in Western Ger
many 5/7 October 1988
pp. 491-531