Bibliography: p403-412. _ Includes index.
Contents: De multiplicatione specierum _ De speculis compurentibus.
Roger Bacon's philosophy of nature : a critical edition, with English translation, introduction, and notes, of De multiplicatione specierum and De speculis comburentibus by Roger Bacon. ISBN 0198581645. Published by Clarendon in 1983. Publication and catalogue information, links to buy online and reader comments.