In this letter we present the results of the search for massive magnetic monopoles in the penetrating cosmic ray radiation using the various subdetectors of the MACRO apparatus, during the period 1989-1995. Flux limits are given for the beta = v/c range 4 x 10(-5) < beta < 1; for 10(-4) < beta < 10(-1) the limits are below the Parker bound, similar to 10(-15) cm(-2)s(-1)sr(-1). (C) 1997 Published by Elsevier Science B.V.
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