Search Results for the EPA National Library Catalog

Items Found: 11

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Your Search: (AUTHOR=Harper AND John AND L.)

 
 
 

Select Item Title Year Published
Ecology : from individuals to ecosystems / 2006
Ecology : individuals, populations, and communities / 1990
Ecology : individuals, populations, and communities / 1996
Hygiene Hogback natural area study / 1970
Oil and gas developments in Pennsylvania in 1978 / 1979
Oil and gas developments in Pennsylvania in 1987 / 1988
Oil and gas developments in Pennsylvania in 1988 / 1989
Oil and gas developments in Pennsylvania in 1989 / 1990
Oil and gas developments in Pennsylvania in 1990 : with ten-year review and forecast / 1992
Oil and gas developments in Pennsylvania in 1991 / 1993
Population biology of plants 1977

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