General chemistry
Kenneth W. Whitten, Raymond E. Davis, M. Larry Peck ; with essay contributions from Ronald A. DeLorenzo
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Twenty years a-growing
Maurice O'Sullivan ; rendered from the original Irish with a preface by Moya Llewelyn Davis and George Thomson ; with an introductory note by E.M. Forster
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The IUCN review of the Southern Okavango Integrated Water Development Project
T. Scudder, R.E. Manley, R.W. Coley, R.K. Davis, J. Green, G.W. Howard, S.W. Lawry, D. Martz, P.P. Rogers, A.R.D. Taylor, S.D. Turner, G.F. White and E.P. Wright
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