@book{1353850,
	author = {"TRACHTENBERG JAKOW/TRNS-CUTLETR ANN , MCSHANE RUDOLPH." and "TRACHTENBERG JAKOW/TRNS-CUTLETR ANN , MCSHANE RUDOLPH."},
	title = {TRACHTENBERG 1888-1951 SPEED SYSTEM OF BASIC MATHEMATICS transltd fromoriginal German.},
	publisher = {"SOUVENIR PRESS LTD, LONDON."}
}