00874cam a2200241 a 45000010008000000030008000080050017000160080041000330100017000740200015000910400027001060500026001330820017001592450130001762600103003063000035004093650014004444400027004585040051004856500042005367000026005787000028006041926324BD-DhUL20141225110553.0851202s1971    enka     b    001 0 eng    a   85234469   a0632064307  aDLCcDLCdDLCdBD-DhUL00aQH96.57.P75bM36 198400a591.929bEDM02aA Manual on methods for the assessment of secondary productivity in fresh waters /cedited by W. T. Edmondson, G. G. Winberg.  aBoston ;aLondon :bBlackwell Scientific Publications,bInternational biological programme,c1971.  axxiv, 358 p. :bill. ;c24 cm.  aUSDb6.75 0aIBP handbook ;vno. 17  aIncludes bibliographical references and index. 0aFreshwater productivityxMeasurement.1 aEdmondson, W. T.eed.1 aWinberg, G. G. eco-ed.