MARKING PHEROMONES OF MEGABOMBUS SYLVARUM (L.) AND M. RUDERARIUS (MULLER) MALES (HYMENOPTERA : APIDAE) Günnar BERGSTRÖM, Monica APPELGREN, Bo G. SVENSSON, Lennart ÅGREN, Charles DESCOINS, Brigitte FREROT, Martine GALLOIS and Martine LETTEREApidologie, 16 1 (1985) 57-68DOI: https://doi.org/10.1051/apido:19850106
