Thomas Meehan
United States.: Bureau of Entomology and Plant Quarantine
D. F. Mayer
Norbert de Buck
Unknown Author
A. H. Hendrickson
Masters John Godfery
Richy J. Harrod
Specialists' Meeting on Insect Pollination in Greenhouses (1999 Soesterberg, Netherlands)
Intawat Burikam
Francesca Grazzini
International Symposium on Pollination (7th 1996 Lethbridge, Alta.)
Aileen Lucia Fisher
Iris T. Blaylock
Eva Crane
Helen Kennedy
Jacques Lhonoré
Mont A. Cazier
Pat Willmer