登入
選單
返回
Google圖書搜尋
Canadian Havens from Hay Fever
I. John Bassett
Clifford W. Crompton
Clarence Frankton
出版
Canada Department of Agriculture
, 1976
ISBN
0662001184
9780662001188
URL
http://books.google.com.hk/books?id=FdNcygAACAAJ&hl=&source=gbs_api
註釋
This bulletin contains information on the biology of pollen important in hay fever; the species of ragweed that occur in Canada; the geographic distribution of pollen causing hay fever, and its abundance by season; and ragweed pollen air indexes, arranged by province & city.
