Columbia subject headings:
Tumor antigens--Congresses.
Tumors--Immunological aspects--Congresses.
Xenografts--Congresses.
Harvard subject headings:
Tumor antigens--Congresses
Tumors--Immunological aspects--Congresses
Xenografts--Congresses.
Princeton subject headings:
Tumor antigens--Congresses.
Tumors--Immunological aspects--Congresses.
Xenografts--Congresses.