Wolff, P. M., Clarke, L., & Laevastu, T. (1969). Oceanic part of the hydrological cycle: A review on evaporation and precipitation over the oceans and transport of water vapour across the continental boundaries. World Meteorological Organization.

Wolff, Paul M., L. Clarke, and Taivo Laevastu. Oceanic Part of the Hydrological Cycle: A Review on Evaporation and Precipitation over the Oceans and Transport of Water Vapour Across the Continental Boundaries. Geneva: World Meteorological Organization, 1969.

Wolff, Paul M., et al. Oceanic Part of the Hydrological Cycle: A Review on Evaporation and Precipitation over the Oceans and Transport of Water Vapour Across the Continental Boundaries. World Meteorological Organization, 1969.