APA
Beers W. F. J. v., . (1976). Computing drain spacings. International institute for land reclamation and improvement: Netherlands.
Chicago
Beers W F J van, . 1976. Computing drain spacings. International institute for land reclamation and improvement: Netherlands.
Harvard
Beers W. F. J. v., . (1976). Computing drain spacings. International institute for land reclamation and improvement: Netherlands.
MLA
Beers W F J van, . Computing drain spacings. International institute for land reclamation and improvement: Netherlands. 1976.