000			00642nam a2200193Ia 4500
008			131101s9999 xx 000 0 und d
020			_a632006161
040			_aCIFRI LIBRARY
041			_aEnglish
082			_a551.482 _bD744
245		2	_aA Manual on methods for the assessment of secondary productivity in fresh waters _cedited by John A. Downing and Frank H. Rigler
250			_a2nd ed.
260			_aOxford _bBlackwell Scientific Publications _c1984
300			_axxiv,501p.; fig.
500			_aIncudes bibliography and index
650			_aFreshwater productivity - Measurement
700			_aDowning, John A., ed.
942			_cBK _01
999			_c2157 _d2157