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A comprehensive work by Roger Bacon, including bibliographical references and index, exploring various subjects in the 'Opus Majus'.

Accessory iso-chromosomes in the moss Dicranum majus. Nature 165, 894. Article CAS PubMed Google Scholar Vaarama, A. 1953. Chromosome fragmentation and accessory chromosomes in Orthotrichum tenellum.

Ground covers like brass buttons, frogfruit, blue star creeper, and silver carpet are perfect to use to fill areas where grass won't seem to take.