An online version can be found here.
Collected by: Jim Rutherford, Max Leisibach, and Herbert Rice, 1978, "Traditional Suspension Bridges in Taplejung District", SATA/SKAT.
"Free use can be made of the information in this publication provided the source is properly indicated."
This book may be available from:
Swiss Center for Appropriate Technology
CH-9000 St. Gall