Walsh, L. M. (1971). Instrumental methods for analysis of soils and plant tissue. soil science society of america.
Lua i Stíl Chicago (17ú heag.)Walsh, L. M. Instrumental Methods for Analysis of Soils and Plant Tissue. soil science society of america, 1971.
Lua MLA (8ú heag.)Walsh, L. M. Instrumental Methods for Analysis of Soils and Plant Tissue. soil science society of america, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.