National Extension Water Quality Database
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https://cmr.earthdata.nasa.gov/search/concepts/C1214607531-SCIOPS.html
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资源简介：
The "National Extension Water Quality Database" provides
Cooperative Extension Staff online computer access to
educational resources for water quality developed by the
Cooperative Extension Service across the United States. Types of
educational resources include slide sets, video tapes, and
computer software. New data (documents) are added weekly. All
documents, slide sets, video tapes, and computer software has
been prepared and approved for use in the individual state
Extension Service. Citations are collected by project managers
at Purdue University by contacting the Extension Water Quality
Coordinator in each state extension service.
Collection Organization: Cooperative Extension Service.
Collection Methodology: Citations were collected by project
managers at Purdue University by contacting the Extension Water
Quality Coordinator in each state extension service.
Collection Frequency: New data (documents) are added weekly.
Update Characteristics: It is not updated in its entirety.
STATISTICAL INFORMATION:
1750 citations. More than 150 actual documents.
LANGUAGE:
English
ACCESS/AVAILABILITY:
The data set includes 2,670 citations with more than 1,000
actual documents. The National Extension Water Quality Database
may be accessed online, via the internet or through a modem. If
using internet, then telnet hermes.ecn.purdue.edu; login as
cerf, password: purdue. If using a modem, then dial
1-317-494-8350 Login as demo and follow instruction. Also, this
database may be accessed via the WWW at:
'http://hermes.ecn.purdue.edu:8001/water/water.html'
提供机构：
SCIOPS
