PDFs of text and lab manuals
Measuring and Monitoring Plant Populations, Elzinga, Salzer, and Willoughby, 1996 Monitoring Manual for Grassland, Shrubland and Savanna Ecosystems, Volume I, Herrick, Van Zee, Havstad, Burkett, and Whitford. 2005. Sampling Vegetation Attributes, Interagency Technical Reference, 1999 Utilization Studies and Residual Measurements, Interagency Technical Reference, 1999
 
Interpreting Indicators of Rangeland Health, Pellant 2005