1. Chemical analysis of ecological materials;Allen,1974
2. Recycling animal waste as a feedstuff: A review;Bhattacharya;J. Anim. Sci.,1975
3. Recycled dried poultry manure in chick starter diets;Biely;Br. Pollut. Sci.,1976
4. Algas de importancia económica;Diaz-Piferrer;El Farol,1967
5. Evaluation of activated sludge as a poultry feed ingredient;Eldred;Fla agric. exp. stn, Res. Rep.,1976