by Wille, M, Wille, H, Lehnherr, B
Published in Journal suisse d'apiculture (1980)

by Lehnherr, B, Lavanchy, P, Wille, M
Published in Journal suisse d'apiculture (1980)

by Lehnherr, B, Wille, M, Wille, H
Published in Journal suisse d'apiculture (1980)

by Wille, H
Published in Journal suisse d'apiculture (1980)

by Carre, P
Published in Journal suisse d'apiculture (1980)

by Zimmermann, P
Published in Journal suisse d'apiculture (1979)

by Maquelin, C
Published in Journal suisse d'apiculture (1978)

by Frainier, M
Published in Journal suisse d'apiculture (1978)

by Wille, H
Published in Journal suisse d'apiculture (1977)

by Muller, T
Published in Journal suisse d'apiculture (1976)

by Hopkins, S.J
Published in Journal suisse d'apiculture (1976)

by Wille, H
Published in Journal suisse d'apiculture (1976)

by Lechaire, M
Published in Journal suisse d'apiculture (1976)

by Bille, S
Published in Journal suisse d'apiculture (1976)

by Fournier, A
Published in Journal suisse d'apiculture (1976)

by Frainier, M
Published in Journal suisse d'apiculture (1976)

by Chammartin, J
Published in Journal suisse d'apiculture (1976)

by Pont, A
Published in Journal suisse d'apiculture (1975)

by Taylor, W.D
Published in Journal suisse d'apiculture (1975)

by Connor, N.G
Published in Journal suisse d'apiculture (1975)