TY - RPRT TI - First record: a methodological approach to counter sampling bias. AU - L Clark Johnson AU - Randal Beaton AU - Shirley A Murphy PY - 2004 DO - 10.2466/pr0.95.2.391-392 UR - https://pubmed.ncbi.nlm.nih.gov/15587198/ ID - 15587198 ER -