1. "Gulliver"—A Quest for Life on Mars
2. “Life Sciences and Space Research II”;Levin,1964
3. Radioisotope Biochemical Probe for Extraterrestrial Life, Ann. Repts (1962--1965). NASA Contract No. NASr-10, Hazleton Lab., Falls Church, Virginia (Resources Res., Washington, D.C.).
4. A Rapid Method for Detection of Microorganisms by ATP Assay; Its Possible Application in Virus and Cancer Studies
5. “Life Sciences and Space Research III”;Levin,1965