241. Messenger RNA: An Evaluation

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242. Minireview: Unusual Reverse Transcriptases

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243. Minutes of the Eleventh Meeting of the Executive Recombinant DNA Committee

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244. Motherhood 'Myth' Miffs Mother Who Works

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245. National Cancer Institute (NCI) staff

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246. National Cancer Institute Oral History Project: Interview with Maxine Singer

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247. National Institute of Arthritic and Metabolic Diseases (NIAMD) staff

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248. National Institute of Arthritic and Metabolic Diseases (NIAMD) staff

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249. National Institute of Arthritic and Metabolic Diseases (NIAMD) staff

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250. National Institute of Arthritic and Metabolic Diseases (NIAMD) staff

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251. Open Letter to the Asilomar Conference on Hazards of Recombinant DNA

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252. Ordinance No. 5010: Regulating the Use of Hazardous Biological Research in the City of Berkeley

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253. Ordinance for the Use of Recombinant Molecule Technology in the City of Cambridge

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254. Party for Chris Anfinsen 10/24/72

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255. Paul Berg speaking at the March 1977 National Academy of Sciences Forum on Recombinant DNA

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256. Phosphorolysis of Oligoribonucleotides by Polynucleotide Phosphorylase

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257. Portrait of Maxine Singer

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258. Potential Biohazards of Recombinant DNA Molecules [Letter to the Editor of Science]

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259. Proposal for an International Conference on the Social and Ethical Implications of Genetic Engineering

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260. Protestors and their banner at the March 1977 National Academy of Sciences Forum on Recombinant DNA

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