Groundwater education : a challenge for the Cooperative Extension System. 的封面图片
Groundwater education : a challenge for the Cooperative Extension System.
TITLE_DISPLAY:
Groundwater education : a challenge for the Cooperative Extension System.
出版信息:
[Washington, D.C.] : Extension Committee on Organization and Policy, [1985].
格式:
图书
物理描述:
45 p. ; 28 cm.