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  Search result  Your search for [author]Gruhn, P. returned 4 records.  
 
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  Book Integrated nutrient management, soil fertility and sustainable agriculture: current issues and future challenges.

by Gruhn, P.; Washington: IFPRI.

Subject: Plant nutrients; Soil management and nutrients.

  
     
Relevance: 16.76%
 
     
  Book The modern junior high school.

by Gruhn, William Theodore; New York: Ronald Press Co., 1947.

Subject: Junior high schools.

  
     
Relevance: 15.23%
 
     
  Book Student teaching in the elementary school.

by Lindsey, Margaret; New York: Ronald Press, 1957.

Subject: Student teaching.

  
     
Relevance: 9.34%
 
     
  Book Principles and practices of secondary education.

by Anderson, Vernon Ellsworth, 1908-; New York: Ronald Press, 1962.

Subject: Education, Secondary.

  
     
Relevance: 8.36%
 
     
 
         
         
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