APA Citation

United States. Weather Bureau. (1957). Daily 100-millibar and 50-millibar and three times monthly 30-millibar synoptic weather maps. Washington.

Chicago Style Citation

United States. Weather Bureau. Daily 100-millibar and 50-millibar and Three Times Monthly 30-millibar Synoptic Weather Maps. Washington, 1957.

MLA Citation

United States. Weather Bureau. Daily 100-millibar and 50-millibar and Three Times Monthly 30-millibar Synoptic Weather Maps. Washington, 1957.

Warning: These citations may not always be 100% accurate.