APA

Holtan-Hartwig L., Bockman O. C., . (1994). Ammonia exchange between crops and air. : .

Chicago

Holtan-Hartwig Liv, Bockman Oluf Chr, . 1994. Ammonia exchange between crops and air. : .

Harvard

Holtan-Hartwig L., Bockman O. C., . (1994). Ammonia exchange between crops and air. : .

MLA

Holtan-Hartwig Liv, Bockman Oluf Chr, . Ammonia exchange between crops and air. : . 1994.