Columbia subject headings:
DNA--Synthesis--Congresses.
Genetic recombination--Congresses.
Recombinant DNA--Congresses.
Harvard subject headings:
DNA replication--Congresses.
DNA--Synthesis--Congresses.
Genetic recombination--Congresses.
Recombinant DNA--Congresses
Princeton subject headings:
DNA replication--Congresses.
Genetic recombination--Congresses.
Recombinant DNA--Congresses.