Ferrer, Harold Peter Screening for health : theory and practice / by H.P. Ferrer; w ith a foreword by Andrew B. Semple. - London : Butterworths , 1968. - xi, 212 p. : 8 plates, ill. ; 23 cm. Includes bibliographies. Subjects--Topical Terms: Medical Screening-------- National Library of Medicine Call No.: WA 100 / F414s