[PDF][PDF] The ash yield of calumba
EL Newcomb, CH Rogers… - Journal of the American …, 1921 - scholar.archive.org
Calumba is a drug which is ordinarily considered to be quite clean. A careful study of a
series of samples indicates that there may be nearly five percent of dirt present. The majority …
series of samples indicates that there may be nearly five percent of dirt present. The majority …
[引用][C] The ash yield of calumba
EL Newcomb, CH Rogers… - Journal of the American …, 1921 - Wiley Online Library
Calumba is a drug which is ordinarily considered to be quite clean. A careful study of a
series of samples indicates that there may be nearly five percent of dirt present. The majority …
series of samples indicates that there may be nearly five percent of dirt present. The majority …