海量图书期刊资源，随时随地畅享阅读乐趣
Does guanine concentration in house-dust samples reflect house-dust mite exposure?T.E. Hallas; Xue Yi; C. Schou · 1993
Morsus insecti from flea bites: seasonal appearance and relation to sex and age of flea-exposed personsT.E. Hallas; K. Roesdahl · 1993