Columbia subject headings:
Harvard subject headings:
Biological pest control agents--Congresses.
Insect pests--Biological control--Congresses
Princeton subject headings:
Biological pest control agents--Congresses.
Biological pest control agents--Environmental aspects--Congresses.
Natural pesticides--Congresses.
Natural pesticides--Environmental aspects--Congresses.
Pests--Biological control--Congresses.
Pests--Biological control--Environmental aspects--Congresses.