Is there an English translation of "Wie sich entscheiden lässt, ob zwei gegebene
krumme Flächen auf einander abwickelbar sind oder nicht..."
by Ferdinand Minding, Journal für die reine und angewandte
Mathematik, (page(s) 370 - 387) Berlin; 1839


Or is there a simpler or more recent proof of the same theorem?
(This states that isometric triangles on surfaces with the same Gaussian curvature are congruent, and vv if I understand the theorem correctly) 



Is there an English translation of Minding's 1839 paper?
*Is there a simpler or more recent proof of the same theorem?* The theorem is given as an [exercise with solution](http://www.math.ethz.ch/education/bachelor/lectures/fs2014/math/dg2/hw13_solutions.pdf) (number 1.2) in this [differential geometry course](http://www.math.ethz.ch/education/bachelor/lectures/fs2014/math/dg2/) by Michael Eichmair at the ETH.


You can also find a proof on page 292 of [A New Approach to Differential Geometry using Clifford's Geometric Algebra](http://books.google.nl/books?id=s2DUp99h_X8C&pg=PA292&lpg=PA292#v=onepage&q&f=false) by John Snygg, and on page 282 of [Differential Geometry](http://books.google.nl/books?id=Vw3CAgAAQBAJ&pg=PA282#v=onepage&q&f=false) by Erwin Kreyszig.


