Columbia subject headings:
DNA--Periodicals.
Genetic engineering--Technique--Periodicals.
Nucleic acids--Periodicals.
Recombinant DNA--Periodicals.
Harvard subject headings:
DNA--Periodicals.
Genetic engineering--Technique--Periodicals.
Nucleic acids--Periodicals.
Princeton subject headings:
Periodicals.
Recombinant DNA--Periodicals.