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Hubble space telescope observations of comet p/shoemaker-levy 9 (1993e).
Weaver HA, Feldman PD, A'hearn MF, Arpigny C, Brown RA, Helin EF, Levy DH, Marsden BG, Meech KJ, Larson SM, Noll KS, Scotti JV, Sekanina Z, Shoemaker CS, Shoemaker EM, Smith TE, Storrs AD, Yeomans DK, Zellner B. Weaver HA, et al. Among authors: Helin EF. Science. 1994 Feb 11;263(5148):787-91. doi: 10.1126/science.263.5148.787. Science. 1994. PMID: 17770832
Bibliographie internationale de démographie historique, 1981.
Hélin E, Lebrun M, Grégoire-Reiters M. Hélin E, et al. Ann Demogr Hist (Paris). 1981:v-cxii. Ann Demogr Hist (Paris). 1981. PMID: 11628655 French. No abstract available.
International bibliography of historical demography, 1980.
Hélin E, Lebrun M, Grégoire-Reiters M. Hélin E, et al. Ann Demogr Hist (Paris). 1980:I-CXI. Ann Demogr Hist (Paris). 1980. PMID: 11628608 French. No abstract available.
Negotiating a professional nurses contract.
Helin EB. Helin EB. Hosp Top. 1978 Mar-Apr;56(2):24-8. doi: 10.1080/00185868.1978.9948076. Hosp Top. 1978. PMID: 658957 No abstract available.
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