South Africa. Weather Bureau. (1962). International Geophysical Year (1957-58) world weather maps: Part 3, southern hemisphere south of 20S̊, daily sea level and 500 millibar charts (July 1957 - December 1958]. Weather Bureau.
Chicago Style (17th ed.) CitationSouth Africa. Weather Bureau. International Geophysical Year (1957-58) World Weather Maps: Part 3, Southern Hemisphere South of 20S̊, Daily Sea Level and 500 Millibar Charts (July 1957 - December 1958]. Pretoria: Weather Bureau, 1962.
MLA (8th ed.) CitationSouth Africa. Weather Bureau. International Geophysical Year (1957-58) World Weather Maps: Part 3, Southern Hemisphere South of 20S̊, Daily Sea Level and 500 Millibar Charts (July 1957 - December 1958]. Weather Bureau, 1962.
Warning: These citations may not always be 100% accurate.