World Meteorological Organization. (2012). Guide to meteorological instruments and methods of observation (7th ed.). Geneva, Switzerland: Secretariat of the World Meteorological Organization.
"This fully revised Seventh Edition includes new topics and chapters, reflecting recent technological developments. Its purpose, as with the previous editions, is to give comprehensive and up-to-date guidance on the most effective practices for carrying out meteorological observations and measurements."
Free PDF version available >>
![[Image: wmo_8.jpg]](http://library.wmo.int/pmb_ged/images/wmo_8.jpg)
"This fully revised Seventh Edition includes new topics and chapters, reflecting recent technological developments. Its purpose, as with the previous editions, is to give comprehensive and up-to-date guidance on the most effective practices for carrying out meteorological observations and measurements."
Free PDF version available >>