TY - BOOK AU - Trethowan,Stanley C. TI - Manual of river and lakemanship PY - 0000///[?] CY - Harare PB - Government Printer KW - Inland navigation KW - Law and legislation KW - Zimbabwe KW - Navigation KW - Safety measures KW - Waterways KW - Handbooks, manuals, etc N1 - At head of title: Zimbabwe inland waters ER -