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Human Kinetics
> Ralph L. Johnson
Ralph L. Johnson
title
ISBN-13
(ISBN-10)
year of publica-
tion
other author(s)
Ymca Pool Operations Manual
978-O-736O-55O7-9
(O-736O-55O7-X)
2006
Gerald E. Demers
L.J.
·
L. Johnson
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R.J.
·
R. Johnson
·
R. L
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R. L. Johnson
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Ralph Johnson
Ralph L. Keeney