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person:(Work, A.)

    Design and performance of ion engine systems for control of earth satellites

    Collett, C. R. / Kaplan, M. H. / Molitor, J. H. et al. | NTRS | 1964

    Appraising changes in continental migratory bird habitat

    Nelson, H. K. / Work, E. A., Jr. | NTRS | 1973