1. Leaf analysis: Possibilities and limitations;Bar-Akiva,1972
2. Effect of phosphorus and chicken manure on yield, fruit quality and leaf composition of grapefruit trees;Bar-Akiva,1968
3. Fertilizer experiments in the citrus orchards of Northern Negev area;Bar-Akiva;Preliminary Rep.,1969
4. Practicum der Biochemie der Pflanzen;Beloserski,1956
5. Levels of phosphate esters in Spirodela;Bieleski;Plant Physiol.,1968