T1 Standard chemical methods for marine environmental monitoring A1 United Nations Environment Programme/Mediterranean Action Plan, PB United Nations Environment Programme YR 1988 FD 1988 LK https://wedocs.unep.org/handle/20.500.11822/1578 UL https://wedocs.unep.org/handle/20.500.11822/1578 DS UN Environment Document Repository RD Sep 18, 2026