Monitoring reports (in Latvian)

Year	Month	Desription	File
2011	May	38 stations
2010	August	42 stations
	May	56 stations
2009	November	27 stations
	August	41 stations
	May	45 stations
	March	36 stations
2008	November-December	28 stations
	September	47 stations
	August	17 stations
	July	14 stations
	July	8 stations
	April-May	55 stations
	April	6 stations
	March	42 stations
	January	6 stations
2007	November	23 stations
	September	6 stations
	August	30 stations
	July	6 stations
	May	33 stations
	April	6 stations
	January	27 stations
2006	September-October	6 stations
	August-September	26 stations
	July	6 stations
	May-June	33 stations
	April-May	6 stations
	April	5 stations