كتب ذات صلة

The phosphates of America. Where and how they occur; how they are mined; and what they cost. With practical treatises on the manufacture of sulphuric acid, acid phosphate, phosphoric acid, and concentrated super-phosphates, and selected methods of chemical analysis.

Fertilizer resources of the United States.

The effect of ignition on the solubility of soil phosphate.

The phosphates of America. Where and how they occur; how they are mined; and what they cost.

• Water reptiles of the past and present
  المؤلفون: Williston, Samuel Wendell
• Water plants a study of aquatic angiosperms.
  المؤلفون: Arber, Agnes (Robertson) 1879-1960
• The wanderings of animals
  المؤلفون: Gadow, Hans