1. Chaparral plants;Hellmers;Chronica Botan.,1957
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3. Krammes , Jay S. Erosion from mountain side slopes after fire in southern California, U. S. Forest Serv., Pacific Southwest Forest Range Expt. Sta. Res. Note 171 1960
4. Altering soil properties with chemicals;Lamb;Chem. Eng. News,1954
5. Wetting agents;Letey;Calif. Agr.,1961