John L. Zumrick; J. Joseph Prosser; H.V. Grey - NSS Cavern Diving Manual

Branford (FL): National Speleological Society Cave Diving Section, 1988. Paper bound, first edition, illustrated, vi + Pp121. Includes numerous appendices and index. Bookplate inside front cover with previous owner name and date inked to title page else a tight and unmarked, very good or better copy. 185 grams. We welcome all reasonable offers on our books.

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