Columbia subject headings:
Genetic engineering--Congresses.
Helminthiasis--Immunological aspects--Congresses.
Helminthiasis--Prevention--Congresses.
Parasite antigens--Synthesis--Congresses.
Schistosomiasis--Immunological aspects--Congresses.
Harvard subject headings:
Conference papers and proceedings.
Genetic engineering--Congresses.
Helminthiasis--Immunological aspects--Congresses.
Helminthiasis--Prevention--Congresses.
Parasite antigens--Synthesis--Congresses.
Schistosomiasis--Immunological aspects--Congresses.
Princeton subject headings: