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ACKNOWLEDGMENTS
!
For the 1
st
and 2
nd
editions of this text
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John Pennefather, who assisted Carl Edmonds in reviewing and updating
the text
Clarrie Lawler, who supplied many excellent diagrams
Richard Chesher, for spectacular photographs
John Lippmann
,
CEO, DAN Asia-Pacific, for advice, corrections and
preparation of both earlier and this edition
Richard Pyle for technical diving diagrams Cis-Lunar Development
Laboratorie