The Craft of Scientific Writing, 3rd edition is designed to help scientists and engineers write about their work clearly and effectively. Using scores of examples from a wide variety of disciplines, the book demonstrates the differences between strong scientific writing and weak scientific writing. In essence, this book shows you how to bring your ideas across to your intended audience. In addition, it contains advice on how to start writing and how to revise your drafts.
Michael Alley on avoiding ambiguities (Chapter 5).
More discussion about avoiding ambiguities (Chapter 5).