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    A survey of current developments in surface tension devices for propellant acquisition

    Balzer, D. L. / Brill, Y. / De Brock, S. C. et al. | NTRS | 1971

    A Generalization of the Software Engineering Maturity Model

    Brammer, K. G. / Brill, J. H. / North Atlantic Treaty Organization | British Library Conference Proceedings | 1993