54 resultados para survey data
Resumo:
Cover title.
Resumo:
"September 1967."
Resumo:
"April 1968."
Resumo:
Mode of access: Internet.
Resumo:
"September 1967."
Resumo:
"August 1966."
Resumo:
Mode of access: Internet.
Resumo:
"August 1969."
Resumo:
Includes indexes.
Resumo:
Mode of access: Internet.
Resumo:
Mode of access: Internet.
Resumo:
Mode of access: Internet.
Resumo:
Cover title.
Resumo:
"IEPA/BOW/00-001"--Cover.
Resumo:
"The Illinois Environmental Protection Agency monitors surface waters (i.e. lakes and streams) through a variety of programs. The most extensive is the Ambient Water Quality Monitoring Network (AWQMN) which consists of 203 stream stations statewide sampled on a 6 week cycle since October 1977." -- p. 1.